Source document: https://docs-lawep.s3.us-east-2.amazonaws.com/1698835120402.pdf (Uganda)
THE ELECTRICITY ACT (1964 REVISION).

Statutory Instrument 144—1.

The Electricity Regulations.

Arrangement of Regulations.

PART I—PRELIMINARY.

Regulation 1.

2.

3.

4.

5.

Citation.

Interpretation.

Application of Regulations.

Exemption from Regulations.

Default and penalty.

PART II—REGULATIONS PRESCRIBING GENERAL CONDITIONS ON WHICH LICENSEES MAY SUPPLY ENERGY.

System, frequency and pressure of supply.

Regulation of pressure and frequency of supply.

Constant supply.

6.

7.

8.

9.


Measures for restricting the area liable to stoppage.

10.

Notice of completion of works.

11.

Report of interruptions in supply.

12.

Fire risks.

13.

Testing of consumer’s installation.

PART III—REGULATIONS FOR SECURING THE SAFETY OF THE PUBLIC.

General.

14.

Inspection and maintenance of works.

15.

Lines not in operation to be removed.

16.

Materials and apparatus used.

17.

Connection of circuits with earth.

18.

Testing earth connections.

19.


Conditions of direct current supply with earth return.

20.

Insulation of electric supply lines and circuits.

21.

Precautions in working on conductors or apparatus.

22.

Safety appliances.

23.

Fire-fighting appliances.

24.

Resuscitation notices.

25.

Warning signs.

26.

Earth connections for lightning arresters.

27.

Feeder and distributor protection.

Apparatus and installations.

28.

Switchboards in generating stations and substations.

29.

Transformers.
29.

Transformers.

30.

Motor, generator and electric cooking range installations.

31.

Arc lamps.

Installations on consumer’s premises.

32.

33.

Service connections on consumer’s premises.

Overhead lines.

34.

Minimum size conductor.

35.

Material and quality of overhead line conductors.

36.

Factor of safety of overhead line conductors.

37.

Minimum height of overhead line conductors.

38.

Clearances for overhead lines.

39.

Supports for overhead lines.

40.

Maximum length of span.

41.


Angle of crossing streets.

42.

Provisions to prevent danger for low and medium pressure lines.

43.

Provisions to prevent danger for high and extra high pressure lines.

44.

Earth wires on poles.

45.

Lines at different pressures on same supports.

46.

Line and telegraph conductors on same supports.

47.

Service lines.

Underground lines.

Insulation, protection and laying of underground lines.

48.

49.

Construction of receptacles for underground lines.

50.
50.

Precautions against metal becoming charged.

51.

Protection when brought through the surface of the ground.

52.

Lines in tunnels or subways.

53.

Precaution against leakage.

54.

Street-boxes.

55.

Earthing and continuity of conduits, sheathing, etc.

Protection of telegraphs and railways.

56.

Location of underground lines.

57.

Location of overhead lines.

58.

Protection of telegraph lines.

59.

Notice and approval where telegraph line is operated by other person.

60.

Railway crossings.


THE ELECTRICITY ACT (1964 REVISION).

Statutory Instrument 144—1.

The Electricity Regulations.1 (Under section 58 of the Act.)

PART I—PRELIMINARY.

1.

Citation.

These Regulations may be cited as the Electricity Regulations.

2.

Interpretation.
(1) (a) (b) (c) (d) (e) In these Regulations— “alive” or “live” means having an electric potential different from that of the general mass of the earth; “apparatus” means any or all of the appliances used or which may be used in connection with or relating to the generation, supply and use of electrical energy; “authorised person” means a person appointed by a licensee, the management or owner of an installation, or by a contractor or agent, for the time being, of a licensee or owner to carry out duties incidental to the generation, transformation, distribution or use of electrical energy, provided that such person possesses the necessary qualifications, if any, prescribed for persons performing those duties, or, if no such qualifications are prescribed, is competent for the purpose for which he or she is employed, the burden of proof of competency being on the employer; “bare” means not covered with insulating material; “consumer’s wires” means any electric lines on the consumer’s premises which are electrically connected with the service lines of the licensee at the consumer’s terminals; 1These Regulations were made as Rules under the repealed Electricity Ordinance, 1951 Revision, Cap.
131.

For their present effect, see Cap.

144, section 61, and the Schedule to the Act.
(f) (g) (h) (i) (j) (k) (l) “covered” means adequately covered with insulating material of such quality and thickness that there is no danger; “earth conductor” or “earth wire” means a conductor which is electrically connected to one or more earthing systems and to which non-current-carrying parts may be connected in order to earth them; “installation” includes all materials and apparatus situated upon any premises for use or intended for use in connection with the supply or use of electrical energy to or upon those premises; “insulated” means covered or protected by insulating material; “insulating”, used as an epithet to characterise any substance, means of such size, quality and construction, according to the circumstances, as to afford adequate protection from danger; “line conductor” means a conductor used for transmitting a supply of electrical energy, including so much of any service line as may be under the control of the licensee; “managing director” means managing director of the Uganda Posts and Telecommunications Corporation; (m) “neutral conductor” or “neutral wire” means a conductor or wire (n) (o) directly connected to a neutral point; “overhead line” means any electric supply line which is placed above ground and in the open air; “pressure” means the highest effective difference of potential between any two conductors of a circuit, except that in the case of multiwire circuits, where the neutral is known to be earthed without a circuit breaker or added resistance and where the normal pressure does not exceed 650 volts between any two unearthed conductors, it means the highest effective difference of potential between any one conductor of the circuit and earth.
Where the normal pressure, subject to the variation from the normal permitted by these Regulations, at the point where the electrical energy is supplied or used— (i) does not exceed 30 volts in the case of alternating current and 100 volts in the case of direct current, the pressure shall be deemed an “extra low pressure”; exceeds the values for extra low pressure but does not exceed 250 volts, the pressure shall be deemed a “low pressure”; (ii) (iii) exceeds 250 volts but does not exceed 650 volts, the pressure shall be deemed a “medium pressure”; (iv) exceeds 650 volts but does not exceed 3,000 volts, the (v) pressure shall be deemed a “high pressure”; exceeds 3,000 volts, the pressure shall be deemed an “extra high pressure”; “private road” means a road other than a public road made up and maintained for the purposes of vehicular traffic and includes the whole width of the road reserve; “public road” means a road which is maintained by any authority and includes the whole width of the road reserve; “underground line” means an electric supply line which is placed below ground; “uninsulated conductor” means a conductor in which no provision is made for its insulation from earth.
(p) (q) (r) (s) (2) Other expressions to which meanings are assigned in the Act have the same respective meanings in these Regulations.

(3) Technical terms, unless defined in these Regulations, have the meanings assigned to them in British Standard Specification No.

205 (1926) of the British Engineering Standards Association.

3.

Application of Regulations.


These Regulations shall apply as hereafter specified to every licensee under the Act, and shall apply, in like manner, to a licensee, to every public authority, municipality, company or person generating, transmitting, distributing, supplying or using electrical energy, and to all works or apparatus for any or all of these purposes in Uganda.

4.

Exemption from provisions of Regulations.


The Minister may, at any time, by notice in the Gazette exempt from any or all of the provisions of these Regulations, subject to such conditions (if any) as he or she may think fit— (a) (b) any particular installation, works or apparatus; or any particular class or type of installation, works or apparatus, and may by a similar notice cancel any exemption so notified.

5.

Default and penalty.


Every person who fails to observe any of the conditions or obligations imposed by these Regulations commits an offence and is liable on conviction to a fine not exceeding two hundred shillings for the breach of any such condition or obligation.

PART II—REGULATIONS PRESCRIBING GENERAL CONDITIONS ON WHICH LICENSEES MAY SUPPLY ENERGY.

6.

System, frequency and pressure of supply.
The supply of electrical energy to be given under a licence or authority of the Minister shall be by a three-phase system at a frequency of fifty complete periods per second and, except in the case of high or extra high pressure supplies as authorised in each case by the Minister, at a normal pressure of 415 volts between any two of the conductors of a three-phase system or a normal pressure of 240 volts between any one of the three conductors of a three-phase system and a conductor connected to the neutral point of a three- phase system, which shall be the standard system and the standard pressures of supply; except that— (a) (b) a supply may be given to any consumer from any phase or phases of a standard system; and the Minister may authorise a supply being given to any consumer, by means of converters or transformers, of such nature and description as may be necessitated by the requirements or peculiarities of the business or operation or process of the consumer.
7.

Regulation of pressure and frequency of supply.

(1) The pressure of supply shall be constantly maintained, under any conditions of supply which a consumer is entitled to receive, within 6 percent above or below the nominal pressure at the consumer’s terminals, and the frequency shall be similarly maintained within 2 percent above or below the nominal frequency.
(2) The pressure or frequency shall not be altered or departed from to an extent greater than the variations in subregulation (1) of this regulation except by consent of the Minister and upon such terms and conditions as he or she may impose and after public notice has been given during a period of one month in such manner as the Minister may require of the intention of the licensee to apply for consent to alter the pressure or variation.
(3) On complaint by any consumer that the variation in voltage exceeds the limits specified, or on the instructions of an electric inspector, the licensee shall connect a portable recording voltmeter, to be provided and maintained by the licensee, to record the pressure at the consumer’s terminals.

If the variation thus recorded exceeds the specified limits, the licensee shall take immediate steps to comply with this regulation.

8.

Constant supply.


(1) From the time when a licensee commences to supply energy through any distributing main, he or she shall maintain a supply sufficient for the use of all the consumers for the time being entitled to be supplied from that main, and that supply shall, except so far as the Minister may otherwise from time to time permit, be constantly maintained.
(2) Notwithstanding subregulation (1) of this regulation, for any purpose connected with the efficient working of the undertaking, a licensee may discontinue the supply at such intervals of time and for such periods as he or she may think expedient.

When the supply is so discontinued, reasonable notice to all persons likely to be affected shall be given of the discontinuance and of its probable duration.

9.

Measures for restricting the area liable to stoppage.
A system of distributing mains shall be separated into sections corresponding approximately to the different feeders, and these sections shall be interconnected only through suitable circuit breakers or fuses arranged so as to be easily inspected.

10.

Notice of completion of works.


(1) The licensee shall, prior to the completion of the works which are necessary to install in the first instance in order to comply with the requirements of the licence, or any separate portion of the works, give to the Minister at least one month’s notice in writing of the estimated date of each completion.
(2) The licensee shall not use the works or any portion of the works until the Minister has given notice in writing that he or she has received from the electric inspector a certificate that the works have or that a portion of the works has been satisfactorily carried out.

11.

Report of interruptions in supply.


If an interruption exceeding twelve hours’ duration has occurred at any part of any electric supply line or work, the licensee shall give immediate notice of the interruption to the Minister, together with a report of steps taken to prevent a recurrence of the interruption.

12.

Fire risks.

A licensee in delivering electrical energy to a consumer’s terminals shall exercise all due precautions so as to avoid risk of causing fire on the premises.

13.
13.

Testing of consumer’s installation.
(1) For the purpose of satisfying himself or herself that the requirements of these Regulations are being complied with, the licensee shall require that notice shall be served upon him or her of a consumer’s intention to install wires, fittings and other apparatus on his or her premises, or to alter or extend his or her installation; and the consumer shall render the licensee every facility for inspecting and testing the wires, fittings and apparatus during the progress of the work and after its completion.
(2) If, after making all proper examinations of an installation by testing or otherwise, a licensee is reasonably satisfied that— (a) (b) (c) the wiring, fittings or apparatus are not suitable for the system and voltage of supply; a leakage exists at some part of the circuit of such extent as to be a source of danger and that the leakage does not exist at any part of the circuit belonging to the licensee; or any other requirements of these Regulations are not being complied with, then, and in any such case, the licensee shall not commence a supply or shall discontinue the supply of energy to the consumer’s terminals, as the case may be, and shall give immediate notice in writing to the consumer of the reason for not commencing or for discontinuing the supply.
In either case supply shall not be given until the licensee is reasonably satisfied that the installation is in conformity with these Regulations.
(3) A licensee shall at his or her own cost make all proper examinations and tests before commencing a supply of energy to a consumer’s terminals, but if an installation fails to comply with these Regulations, or if a supply has been discontinued in accordance with any provision of the Act or of these Regulations, the licensee shall be entitled to charge a fee of twenty shillings for reexamination and retest of the installation before giving a supply of energy and, in addition to that fee, the licensee may require the consumer to pay transport charges not exceeding fifty cents per mile of such portion of the forward and return journeys necessarily made by the licensee’s testing officer or servant as lies outside the municipal or township boundary, or, where no such boundary exists, as lies beyond a radius of three miles from the headquarters of that officer or servant.
(4) If any consumer is dissatisfied with the action of the licensee in refusing to give or in discontinuing or in not recommencing the supply of electrical energy to his or her premises, the wires, fittings and apparatus of that consumer shall, on his or her application to the Minister and on payment of the cost, be inspected and tested by an electric inspector, or such other person as the Minister may appoint.
(5) If the electric inspector or that other person is satisfied that the provisions of these Regulations have been carried out and that the wires, fittings and apparatus may be safely connected to the supply, the licensee shall, upon receipt of notice to that effect from the electric inspector or other person appointed by the Minister, immediately supply the consumer with electrical energy and shall refund to the consumer the amount of the cost of the inspection and test.
This provision shall be endorsed upon every notice given to a consumer by a licensee under this rule.

(6) All tests of a consumer’s installations shall be duly recorded by the licensee.

PART III—REGULATIONS FOR SECURING THE SAFETY OF THE PUBLIC.

General.

14.

Inspection and maintenance of works.


In order to ensure at all times continuity of service and immunity from danger, all electric supply lines, apparatus and other works shall be regularly inspected and efficiently maintained in a safe mechanical and electrical condition and in accordance with these Regulations by the licensee or other person owning or operating the electric supply line, apparatus or other works.

15.

Lines not in operation to be removed.


An overhead line shall not be permitted to remain erected after it has ceased to be used for the supply of energy unless the licensee intends within a reasonable time again to use that line.

16.

Materials and apparatus used.


(1) All materials and apparatus used shall at the time of erection conform to the specifications of the British Engineering Standards Association for the time being in force, so far as they are applicable and are not inconsistent with these Regulations.
(2) The Minister may from time to time, by notice in the Gazette, approve methods or types of construction, apparatus or materials not specially provided for in these Regulations, and may impose such conditions as he or she deems necessary with respect to their use.

17.

Connection of circuits with earth.
The connection of circuits with earth shall be made in accordance with the following conditions— (a) (b) in a three-wire direct-current system the intermediate conductor shall be earthed at the generating station only, and the current from the intermediate conductor to earth shall be continuously recorded by means of a recording ammeter; and if at any time the current exceeds 1/1000 part of the maximum supply of current, steps shall be immediately taken to improve the insulation of the system; the intermediate conductor of a low-pressure three-wire single- phase system, and the neutral conductor of a low or medium pressure three-phase four-wire system shall be effectively earthed at the point of supply—that is, at the generating station, substation or transformer—and at such other points along the distributing main as are necessary to give a resistance not exceeding 10 ohms between any point in the conductor and the general mass of earth; Note—It will be necessary in some instances to run the wire along several poles until a suitable earthing point is obtained.
(c) (d) in high and extra high pressure three-phase star-connected systems the neutral point may be earthed at the point of supply and at the neutral point of each star-connected transformer in the circuit, or alternatively, if the neutral conductor is not earthed, or if the system be delta-connected, then approved means shall be provided in each circuit for indicating faulty insulation in any part of the circuit, and for automatically and immediately earthing the phase or cutting off the faulty circuit.
If the insulation of any circuit is faulty, immediate steps shall be taken to make good the insulation before being again placed in service; in the case of a star-connected system of any voltage the neutral conductor of which is connected to earth, the resistance between that conductor and earth shall be sufficiently low to ensure that the fuse or automatic circuit breaker or trip-coil in any phase shall disconnect the circuit from the source of supply in the event of an accidental earth occurring on that phase, or, in the case of high pressure or extra high pressure lines, on accidental contact with a low pressure line.
In automatic circuit breakers each phase must be equipped with a trip-coil; (e) where any part of a circuit is normally connected with earth, no switch, fuse or circuit breaker shall be inserted in the earthed conductor or in any conductor connected to it, and the connection with earth shall be efficiently maintained, except when it is interrupted by means of a link for the purpose of periodical tests; and subject to the previous consent of the managing director, the earth may be used as a neutral return for transformers.
(f) 18.

Testing earth connections.

(1) A test shall be made by the licensee every twelve months to ensure that all earth wires used in connection with electric supply lines are intact and the earth connections are effective.

(2) The tests shall be made more often than once in every twelve months if so required by the Minister.

(3) All earths on guards erected over or under telegraph lines shall be tested every twelve months, and copies of the tests forwarded to the managing director.
(4) Between the electric supply line or electrical apparatus or other devices to be earthed and the general mass of earth the electrical resistance of each separate earth connection shall not exceed 10 ohms, and shall be as much less than 10 ohms as is required to ensure at all times an immediate and safe discharge to earth of electric energy.

Records shall be kept of all tests made.


(5) The tests required by this regulation shall be made by the licensee during the dry months of the year; and if the Minister is not satisfied that they have been made at a time when the system of earth connections is least effective, he or she may order that the tests shall be remade at a time to be stated in the order.

19.

Conditions of direct current supply with earth return.
In any case in which a direct current supply with earth return is authorised, the following provisions shall apply— (a) (b) (c) (d) (e) (f) a single-pole fusible cut-out or automatic circuit breaker shall be inserted in the positive conductor and arranged to operate with an overload of 100 percent above the rated full load of the circuit; the cut-out or circuit breaker shall be placed in a suitable locked or sealed receptacle of fireproof construction fixed at a convenient height at the point of supply; at the distributing point of a lighting circuit there shall be inserted in the positive conductor a single-pole switch, together with a fuse arranged to operate with an overload of 50 percent above the rated full load of the circuit; in a motor circuit there shall be provided in the immediate vicinity of each motor connected to the circuit a single-pole switch and fusible cut-out or circuit breaker arranged to operate with an overload of 50 percent above the rated full load of the motor so controlled; each motor shall also be fitted with an automatic no-voltage release and a series resistance for starting; and the negative conductor shall be continuous throughout its length without a switch or fuse.
20.

Insulation of electric supply lines and circuits.

(1) Every underground line, after having been placed in position and before it is used for the purpose of supply, shall be tested for insulation at a pressure of at least 500 volts in the case of a low or medium pressure line and at least 2,000 volts in the case of a high or extra high pressure line, and the licensee shall keep a record of the results of those tests.
(2) Where required by the Minister in any particular case, a high or extra high pressure underground line shall not be brought into use until it has been subjected to such tests as the Minister may think fit.

A record of any such tests shall be kept by the licensee.

21.

Precautions in working on conductors or apparatus.
(1) No person except an authorised person or a competent person acting under his or her immediate supervision shall undertake any work on live electric conductors or apparatus where technical knowledge or experience is required in order adequately to avoid danger, and, except in case of emergency due to breakdown or other accident, no person shall work on live high or extra high pressure electric conductors or apparatus unless accompanied by a person competent to render assistance, when necessary.
(2) All persons working on live electric conductors or apparatus shall be competent to apply the method of artificial respiration illustrated on the resuscitation notices required by these Regulations to be displayed in generating stations and substations.
(3) Whenever work is to be carried out on any electric conductor or apparatus which has been disconnected from all source of supply, adequate precautions shall be taken by earthing or other means to discharge electrically that electrical conductor or apparatus or any adjacent electrical conductor or apparatus, if there is danger from it, before it is handled, and any such earth connection shall be maintained until all work on it has been completed.
Properly designed clips attached to insulated sticks shall be used for earthing conductors.

(4) Adequate precautions shall be taken to prevent any conductor or apparatus from being accidentally or inadvertently electrically charged when persons are working on it.

(5) Adequate working space and means of access, free from danger, shall be provided for all apparatus that has to be worked or attended to by any person.
(6) All those parts of premises in which apparatus is placed shall be adequately lighted to prevent danger.

22.

Safety appliances.

(1) When necessary adequately to prevent danger, insulating stands or screens shall be provided and kept permanently in position, and shall be maintained in sound condition.
(2) Portable insulating stands, screens, boots, gloves or other suitable means shall be provided and used when necessary adequately to prevent danger, and shall be periodically examined by an authorised person.

23.

Fire-fighting appliances.


Fire buckets of suitable capacity, filled with clean, dry sand and ready for immediate use in extinguishing fires, or suitable fire extinguishers filled with a nonconducting fluid, shall be kept in a convenient situation in all generating stations and continuously attended substations adjacent to the electrical apparatus and shall be conspicuously marked.

24.

Resuscitation notices.


Such instructions as the Minister may from time to time approve as to the treatment of persons suffering from electric shock shall be affixed in a conspicuous position in all premises where electrical energy is generated, transformed or used above low pressure, and in those premises, or classes of premises, in which electrical energy is generated, transformed or used at low pressure, as the Minister may direct.

25.

Warning signs.
25.

Warning signs.

(1) A notice of standard approved pattern displaying the words “NO ADMITTANCE” shall be placed outside every place containing electrical apparatus where interference with the apparatus may cause danger.

The equivalent words shall be inscribed in the prevailing local Asian and African languages.

(2) A similar notice displaying the word “DANGER” shall be placed near every switchboard or other place where bare conductors are exposed so that they may be touched.
(3) Danger notices of a permanent character and approved design shall be securely fixed to every support for a high or extra high pressure overhead line, and adequate provision shall be made to prevent unauthorised climbing of supports.

26.

Earth connections for lightning arresters.

Earth wires for circuits or equipment shall not be utilised also for earthing lightning arresters for which a separate earth connection shall be provided.

27.

Feeder and distributor protection.


(1) Each outgoing feeder and distributor from any generating station or substation shall be provided with fuses or an automatic circuit breaker equipped with an overload inverse time limit or other approved tripping device.
The fuse or tripping device shall be located in each conductor except an earthed neutral or the earthed external conductor of a concentric cable, and, in the case of three-phase circuits, one overload trip-coil may be replaced by an earth-leakage trip-coil.

(2) All overload devices shall be set to open within three seconds at a current not exceeding 100 percent over the normal rated load of the feeder or distributor, except that in the case of fuses the time stated may be one minute.
In the case of feeders or distributors which supply further subfeeders or subdistributors through automatic circuit breakers, and where selective operation of those circuit breakers is desired, the time-setting of the main feeder or distributor circuit breakers may be increased to fifteen seconds.

(3) Where circuit breakers are used they shall be located in accessible positions and shall be of the loose-handle type.
Each circuit breaker shall be capable of breaking the above-overload current by hand without undue arcing and with no risk of injury to the operator.

(4) Every fuse shall be either of such construction or so protected by a switch that the fusible metal may be readily renewed without danger.

Apparatus and installations.

28.

Switchboards in generating stations and substations.
(1) All generating station and substation switchboards, including the frames to which they are attached, shall be made of fireproof material; and the maximum permissible current and temperature in any conductor mounted on them or leading to them shall not exceed the values permitted under the regulations made from time to time by the Institution of Electrical Engineers of Great Britain.
No conductor at a pressure above 650 volts shall be exposed on the front of any switchboard, and the back of any switchboard with conductors at a pressure of 150 volts and over shall be screened and made inaccessible except to authorised persons.
(2) All generating station and substation switchboards controlling high pressure and extra high pressure circuits shall be provided with two efficient and independent earth connections, connected in parallel, to which all frames, instrument cases, and other non-current-carrying metal parts thereof shall be connected.

Means shall be provided for testing the resistance between these two connections through the earth.
The tests shall be made under the conditions prescribed under regulation 18(5) of these Regulations at intervals not exceeding twelve months and shall be recorded by the licensee.

(3) Every generating station and substation switch intended to be used for breaking a circuit, and every circuit breaker, shall be so constructed or arranged that it cannot be left in partial contact or accidentally fall or move into contact when left out of contact.
All enclosed switches shall have an external attachment to indicate clearly whether the switch is open or closed.

(4) All generating station and substation switchboard circuits shall be so arranged that the course of any main conductor may be readily identified.
(5) Passageways around generating station or substation switchboards other than those of a totally enclosed type shall be such as to provide the clearance specified in this subregulation— (a) (b) low or medium pressure switchboards—an overhead clearance of at least 7 feet from the floor to any bare conductor, and a passageway with at least 3 feet 3 inches horizontal clearance from either front or back of the switchboard or any bare conductor affixed to it; high pressure and extra high pressure switchboards other than operating desks or panels working solely at low pressure—an overhead clearance of not less than 8 feet from the floor to any bare conductor, and a passageway with a horizontal width of not less than 3 feet 6 inches from either front or back of the switchboard.
All conductors must be so screened or guarded that they cannot be touched accidentally, and the prescribed passageway at the back of the board must be measured from this screening.

29.

Transformers.

(1) Where transformers are placed on poles they shall be fitted with watertight cases, and either thoroughly protected against interference or attached to the poles at such a height as to make them inaccessible except by means of a ladder or other special appliance.
Where pole-platform type of construction is adopted and where the platform is large enough to accommodate a person after the transforming apparatus is in position, a suitable railing shall be built around the platform.

Pole steps shall not be placed less than 9 feet above the ground level.
(2) Transformers, other than low pressure transformers of 10 kilowatt capacity or less, placed within a building or enclosure, shall be inaccessible except to authorised persons, and all high or extra high pressure conductors shall be screened and protected against accidental contact.

(3) The cases of all transformers, whether within or without a substation, shall be effectively earthed by a copper conductor.
(4) Where lines of different pressure are taken down poles to transformers or other apparatus, unless the lines are enclosed in pipes, or lead-covered cables are used, they shall be supported vertically by insulators spaced not more than 5 feet apart or by strain insulators fitted at top and bottom, and a clearance of at least 2 feet shall be maintained between the conductors.

30.

Motor, generator and electric cooking range installations.
(1) The frames of fixed motors, generators and electric cooking ranges shall be earthed in accordance with the regulations of the Institution of Electrical Engineers of Great Britain for earthing.

All metal casings of switches, resistances, fuses, cables and wires shall be earthed also in accordance with those regulations.

The earth wire shall be of sufficient current-carrying capacity for the protection of the apparatus to which it is connected.
Reliance on partial or variable insulators (such as concrete foundations) between the frame and the adjacent grounded parts does not offer suitable protection either for equipment or attendants.

(2) Fuses or other automatic cut-outs shall be provided to protect effectively the conductors in each circuit from excess of current.

(3) Terminals of motors, generators and electric cooking ranges must be so guarded that they cannot be accidentally touched or short-circuited.

31.

Arc lamps.
31.

Arc lamps.

(1) All arc lamps shall be so guarded as to prevent pieces of ignited carbon or broken glass falling from them, and shall not be used where there is any danger arising out of the presence of explosive dust or gas.

(2) Arc lamps or any part of an arc lamp used in any street shall be at least 10 feet from the ground.
(3) Arc lamps shall be insulated from earth and shall be fixed so that they cannot swing into contact with any substance, metallic or otherwise, that might connect them with the earth.

(4) Every precaution shall be taken against the danger of shock during trimming of arc lamps.
(5) Resistances for the regulation of arc lamps, if exterior to the lamp, shall be mounted on incombustible bases, shall be so placed that they cannot by induction or radiation set fire to any contiguous material, and shall be of ample size to carry with safety the maximum current that normally flows through them.
(6) Each arc lamp circuit, if wholly insulated, shall be provided with a fuse on each pole, but if one terminal is connected to an earthed neutral or intermediate conductor a fuse shall not be inserted in the connection to the neutral or intermediate conductor.

32.

Installations on consumer’s premises.


(1) All electric wires, fittings and apparatus on a consumer’s premises, except such parts as are required to be earthed, shall be highly insulated and suitable for the voltage at which the supply is given.

They shall be thoroughly protected against injury to the insulation of access of moisture, and the wires and apparatus shall conform to the regulations of the Institution of Electrical Engineers of Great Britain in force for the time being.
(2) In all portable electric inspection lamps the lampholder shall be so completely enclosed by insulating material that it shall be impossible for contact to be made with it by the handle, metal guard or user without dismantling the lamp.

(3) All electric wires shall be so fixed and protected as to prevent the possibility of electrical discharge to any adjacent metallic substance.

33.

Service connections on consumer’s premises.


(1) The licensee shall be responsible for all electric lines, wires, fittings and apparatus belonging to him or her which may be upon a consumer’s premises being erected and maintained in a safe condition and in all respects fit for supplying energy.
(2) A suitable safety fuse or other automatic circuit breaker shall be inserted in each electric service wire within or without a consumer’s premises, and if within it shall be placed as close as possible to the point of entry and contained within a suitably locked or sealed receptacle of fireproof construction.

If fuses are of outdoor type they shall be moisture-proof.
In case of three-wire or four-wire supply the phase or outer wire fuses shall be separated by an insulating partition, and shall be so arranged that any two conductors cannot be touched simultaneously.

In ovens and other apparatus taking three kilowatts or more, a switch shall be located in each phase or outer wire adjacent and within easy reach of the apparatus.

The switch shall be enclosed in a metal casing or shall be shockproof.

Overhead lines.

34.

Minimum size conductor.
(1) The cross-sectional area of any conductor in any low or medium pressure electric supply line laid or erected for the supply of electrical energy shall not be less than 0.0085 square inches, except as provided in regulation 45(2) of these Regulations; for high or extra high pressure electric supply lines the cross-sectional area shall not be less than 0.0128 square inches; provided that a conductor of a cross-sectional area not less than 0.0045 square inches may be used for service connections in spans not exceeding 60 feet.
(2) Earthing wires shall in no case have a cross-sectional area less than 0.02 square inches when installed outdoors or 0.0045 square inches when installed indoors.

35.

Material and quality of overhead line conductors.

(1) Line conductors shall be of copper, aluminium, mild steel or iron or of a combination of aluminium conductors with a steel core or of any other material or combination of materials as may be approved by the Minister.
(2) All line conductors at the time of erection shall comply as regards elongation, ultimate strength and elasticity with the specifications of the British Engineering Standards Association then in force.

36.

Factor of safety of overhead line conductors.

(1) The factor of safety of overhead line conductors shall be two.
The factor of safety shall be based on the breaking load and shall be calculated on the assumption that the line conductors are at a temperature of 50EF and that they are simultaneously subjected to a horizontal wind at right angles to the line, this wind to be taken as exerting a pressure equivalent to 8 pounds per square foot calculated on the whole projected area of the conductors.

(2) The elasticity of the metal shall be allowed for in calculating the sag for line conductors.

37.
37.

Minimum height of overhead line conductors.

(1) For voltages not exceeding the limits of medium pressure, the height from the ground of any line conductor (other than a service line), earth wire or auxiliary conductor at any point of the span at a temperature of 120EF shall not, except with the consent of the Minister, be less than 19 feet across a public road or 17 feet in other positions.

A height of 15 feet may be adopted in situations inaccessible to vehicular traffic.
(2) Where a service line is carried across or along a carriageway, the height of the line from the ground at any part of the carriageway shall not, except with the consent of the Minister, be less than 19 feet and 17 feet respectively.
(3) For voltages exceeding the limits of medium pressure, the height from the ground of any line conductor at any point on the span at a temperature of 120EF shall not, except with the consent of the Minister, be less than the height hereunder stated— (a) (b) (c) voltages not exceeding 66,000 volts voltages exceeding 66,000 volts and not exceeding 110,000 volts voltages exceeding 110,000 volts and not exceeding 165,000 volts (d) voltages exceeding 165,000 volts Feet 20 21 22 23 (4) The height from the ground of an earth wire or auxiliary conductor shall not be less than the minimum heights prescribed in subregulation (1) and (2) of this regulation.
(5) Where overhead lines cross navigable waterways, the minimum height above the water shall be as directed by the Minister.

38.

Clearances for overhead lines.

(1) Overhead lines shall be so erected as to be inaccessible to any person without the use of a ladder or other special appliance, and, unless efficiently protected by insulating material, shall in no case be nearer to any portion of a building than 7 feet or such other distance as the Minister may approve.
(2) Overhead lines crossing electric tramway lines shall have a minimum clearance of 4 feet above the trolley wire.

(3) No overhead line shall come within 2 feet of any other overhead line or cables, except at a pole or support, and then only by arrangement between the respective owners of the lines.

39.

Supports for overhead lines.

(1) Every support for overhead lines shall be so located as to avoid unduly obstructing pedestrian or vehicular traffic.
(2) Every support for an overhead line shall be of durable material and, where necessary in the opinion of the Minister, special precautions shall be taken to prevent the corrosion of all metal work and the deterioration of all wood work at or below the surface of the ground.
(3) The supports, in conjunction with stays or struts if provided, shall withstand the longitudinal, transverse and vertical loads due to the weight of the wires, wind pressure, change of direction of line and unequal length of span without damage and without movement in the ground.

In no case shall the strength of a support in the direction of the overhead line be less than one-quarter of the required strength in a direction transverse to the line.
(4) The following factors of safety shall apply to each support— Material Factor of safety (a) iron or steel (b) wood (c) reinforced concrete 2.5 3.5 3.5 (5) These factors of safety shall be calculated on the assumption that all conductors, cables and wires carried by the supports are at a temperature of 50EF and that together with the supports they are subjected to a wind at right angles to the line, this wind to be taken as exerting a pressure equivalent to 8 pounds per square foot calculated on the whole of the projected area.
(6) The wind pressure on the lee side members of lattice steel or other compound structures, including A and H poles, shall be taken as one-half of the wind pressure on the windward side members.

The factor of safety shall be calculated on the crippling load of struts and upon the elastic limit of tension members.
(7) The conductors shall be attached to suitable insulators carried on crossarms or brackets of suitable material and cross section fixed to the supports or shall be carried on suitable spindles fixed directly to the supports.

Where wooden crossarms are used, a bonding strip of stout wire shall be fastened on the upper side of each arm.
Except where terminating at the support, the conductors shall be so attached to the insulators or guarded that they cannot fall away from the supports in case they become detached from the insulator, but will fall on the crossarm or insulator support.

Guard-hooks erected at angles shall be effectively earthed.
Where electric lines are covered with insulating material they shall be so attached to the insulators that their insulation shall not be impaired by the attachment, and no joint in an insulated conductor shall be made within 4 feet of an insulator.

Pins for pole-top insulators shall not be screwed into the pole top, but attached to the side of the pole.
(8) Distributors at low pressure may be carried on brackets attached to buildings, provided they are inaccessible from any portion of the building without the use of a ladder or other special appliance or that they are so screened as to prevent the possibility of accidental contact by any person, and provided also that except where terminating at such brackets they are secured in such a manner that they cannot fall away from the insulator support or make contact with the building.

40.
40.

Maximum length of span.

(1) The distance between the supports carrying electric supply lines within municipal or town areas, or within such other limits as may be specified in the licence, shall, notwithstanding regulations 36 and 45 of these Regulations, not exceed 180 feet.

(2) The distance between supports carrying electric supply lines outside those limits shall be determined by regulations 36, 37 and 45(c) of these Regulations.

41.

Angle of crossing streets.


Where an overhead line is transferred from one side of a street to the other, the angle formed by the original alignment and the portion of the line crossing the street shall approximate as closely as practicable to a right angle, and shall not, without the permission of the Minister, exceed 135 degrees.

The crossing span shall be as short as possible.

42.

Provisions to prevent danger for low and medium pressure lines.
Where the voltage does not exceed the limits of medium pressure and the voltage to earth exceeds 125 volts, adequate precautions shall be taken by the licensee or owner to prevent danger— (a) (b) (A) from a broken line conductor by the provision of— (i) a neutral or earthed conductor carried continuously from pole to pole below and in the same vertical plane as the line conductors; where the line conductors are run in more than one vertical plane a neutral or other earthed conductor shall be run below the line conductors in each vertical plane of those conductors; (ii) where conductors are placed in close proximity to trees of a kind specially liable to breakage, if so required by the Minister, two neutral or separate earthed conductors run below the line conductors, spaced so that a neutral or earthed conductor projects outside the plane of the line conductors on either side of the pole, and braced to one another three or four times in every span; the spacing of the neutral or earthed wires shall be such as to ensure that line conductors cannot fall to within 10 feet of the ground without making contact with the neutral or earthed wires; or (iii) other means approved by the Minister, and where a separate earthed conductor is run to meet the provisions of this paragraph, it shall be bonded to the supporting metal work of all insulators and shall be earthed at four points in every mile, the points being as nearly equidistant as possible; from leakage by the provision— (i) in cases where metal or concrete poles are used, of— a continuous earth wire run from pole to pole to which all metal work, other than the conductors, shall be permanently and efficiently connected; the continuous earth wire shall be connected with earth at four points in every mile, the spacing between the points being as nearly equidistant as possible; or (B) other means approved by the Minister, and the design and construction of the system of earth connections shall be such that when contact is made between a line conductor and metal
 connected with earth the resulting leakage current, under the worst possible conditions for effective earthing which may arise, shall be not less than 25 percent in excess of the leakage current required to operate the devices which make the line dead; in cases where wooden poles are used, of— (ii) a bonding wire connected to the supporting metal work of all insulators, the bonding wire terminating at the lowest part of the (A) supporting metal work; or (B) other means approved by the Minister, and where lightning conductors are used or other uninsulated conductors are run down poles to within 10 feet of the ground, the precautions for the prevention of danger from leakage shall be as for metal poles; (iii) whether wood, metal or concrete supports are used all stay wires other than those which are connected with earth by means of a continuous earth wire shall be insulated to prevent danger from leakage.
For this purpose an insulator shall be placed in each stay wire at a height of not less than 10 feet from the ground.

43.

Provisions to prevent danger for high and extra high pressure lines.
(1) Where the voltage exceeds the limits of medium pressure, adequate precautions shall be taken by the licensee or owner to prevent danger— (a) from a broken line conductor by the provision of— (i) in the case of a line erected along a public or private road or canal (or within 50 feet of it) or within a municipality, town or railway reserve— (A) duplicate insulators supporting the conductors; (B) a device to ensure that in the event of a line conductor falling it shall be put to earth before approaching within 10 feet of the ground; or (C) other means approved by the Minister; (A) (ii) in the case of a line erected across a public or private road, canal or railway reserve— a device to ensure that in the event of a line conductor falling it shall be put to earth before approaching within 10 feet of the ground; (B) duplicate insulators supporting duplicate conductors tied at intervals not exceeding 5 feet; or (C) other means approved by the Minister; (b) from leakage by the provision of— (i) a continuous earth wire run from pole to pole to which all metal work, other than the conductors, shall be permanently and efficiently connected; the continuous earth wire shall be connected with earth at four points in every mile, the spacing between the points being as nearly equidistant as possible; an effective earthing device at each individual support to which all metal work shall be connected; or (ii) (iii) other means approved by the Minister.
(2) The design and construction of the system of earth connections shall be such that when contact is made between a line conductor and metal connected with earth the resulting leakage current, under the worst possible conditions for effective earthing which may arise, shall be not less than 25 percent in excess of the leakage current required to operate the devices which make the line dead.
(3) All stay wires shall be permanently and efficiently connected to the continuous earth wire or to the earthing system at each individual support.

44.

Earth wires on poles.

(1) Earth wires, where led down poles, shall be protected by a casing for a distance of 8 feet from the ground.

(2) A test shall be made under the conditions prescribed under regulation 18(5) of these Regulations at intervals not exceeding twelve months to ensure that the earth wire is intact and effective.
(3) The results of those tests shall be duly recorded by the licensee.

45.

Lines at different pressures on same supports.


(1) Where low pressure and high pressure, or high and extra high pressure, or all three systems are carried on the same poles and supports, the following conditions shall apply— (a) (b) (c) the extra high pressure shall not exceed 66,000 volts between phases; the neutral point of each system shall be effectively earthed at its source of supply, and in accordance with regulation 17 of these Regulations.
Each connection shall consist of two independent wires to separate sets of earth plates or pipes connected in parallel; the lines of different pressure shall be separated by the undermentioned distances, measured horizontally or vertically at the pole— between— Minimum separation distance (i) medium or any lower pressure and high pressure— (A) (B) if all covered (except neutral) if any bare (except neutral) (ii) medium or any lower pressure and extra high pressure not over 11,000 volts (iii) medium or any lower pressure and extra high pressure over 11,000 volts (iv) high pressure and extra high pressure (v) extra high pressure and extra pressure 2 feet 4 feet 4 feet 6 feet 4 feet 4 feet Under the extremes of wind pressure and temperature embodied in regulation 36 of these Regulations, the separation between wires at the centre of the span shall not be less than one-half of the distances specified in subregulation 1(c) of this regulation.
The pole spacing in cases of subregulation (1)(c)(i), (ii) and (iii) of this regulation shall not exceed 300 feet.

(2) Notwithstanding regulation 34 of these Regulations, the minimum size of conductor to be used shall not be less than 0.0128 square inches.

(3) No low pressure wires shall be above the level of any high pressure or extra high pressure wires, or on the same level as any extra high pressure wires.
(4) Where electric lines being worked on are in proximity to the live high or extra high pressure lines, care must be taken effectively to earth the lines after disconnection and before work commences, in order to discharge electrostatic induction.

46.

Line and telegraph conductors on same supports.

(1) Telegraph wires belonging to the licensee supported on electric supply line poles shall be of hard-drawn copper or other suitable material and shall not be less than 0.0085 square inches in cross section.
The minimum clearance between the lowest point of the span and the ground shall be as specified for line conductors in regulation 37 of these Regulations.

(2) Adequate precautions shall be taken to protect apparatus connected to the wires against injury from lightning, and the wires shall be fused.
(3) If carried on poles also carrying high or extra high pressure wires, such arrangements shall be made where the telephone or telegraph is placed as will prevent the possibility of injury resulting to any person using the telephone or telegraph as the result of a conductor coming into contact with the telegraph wires, or as the result of leakage or of induction.

47.

Service lines.
47.

Service lines.

(1) Service connections from overhead lines shall be taken direct from insulators and shall not be tapped off the overhead lines between supports.

They shall be led as directly as possible to insulators firmly attached to some portion of the consumer’s premises which is not accessible to any person without the use of a ladder or other special appliance.
(2) Every portion of a service line, except an earthed neutral or intermediate conductor, which is outside a building and which is within 7 feet, or such other distance as the Minister may approve, from any portion of the building, or is in any way accessible from the building without the use of a ladder or other special appliance, shall be effectively protected by insulating material approved by the Minister.

Underground lines.

48.

Insulation, protection and laying of underground lines.
(1) Underground conductors shall be thoroughly insulated, and shall be adequately protected from mechanical damage.

(2) The underground conductors shall be laid, wherever possible, under the footpaths, and with a cover of at least 9 inches from the surface of the pavement.

Where laid under the roadway this cover shall not be less than 2 feet except where the soil is of a rocky nature when the depth may be not less than 1 foot.

49.

Construction of receptacles for underground lines.


All conduits, pipes, casings and street-boxes used as receptacles for electric lines shall be constructed of durable material and shall be of ample strength to prevent damage from heavy traffic; and reasonable precautions shall be taken to prevent the accumulation of gas in those receptacles.

50.

Precautions against metal becoming charged.


Where any underground line crosses or is in proximity to any metallic substance, special precautions shall be taken by the licensee against the possibility of any electrical charging of the metallic substances from the underground line, or from any metallic conduit, pipe or casing enclosing the subline.

51.

Protection when brought through the surface of the ground.
Where any underground line is brought through the surface of the ground to connect with overhead lines, it shall be thoroughly insulated and adequately protected from mechanical damage for a height of at least 12 feet above the ground.

52.

Lines in tunnels or subways.

Electric supply lines placed in a tunnel or subway not in the sole occupation of the licensee shall be insulated and protected by a metallic sheath or enclosed in a metal pipe, both being effectively earthed.

53.
53.

Precaution against leakage.

When any high or extra high pressure electric supply line is laid beneath the surface of the ground, efficient means shall be employed to render it impossible that the surface of the ground or any other electric line or conductor shall become charged by leakage from the high or extra high pressure electric supply line.

54.

Street-boxes.
54.

Street-boxes.

The covers of street-boxes shall be so secured that they cannot be opened except by means of a special appliance; and those boxes shall be inspected from time to time for the presence of gas, and suitable action shall be taken to check the influx and accumulation of gas.

55.

Earthing and continuity of conduits, sheathing, etc.
All metal conduits, pipes or casings containing underground lines shall be effectively earthed, and shall be so jointed and connected across all street- boxes and other openings as to make good electrical contact throughout their whole length.

Steel armouring or any other metallic sheathing shall be made continuous throughout the entire length of the cable.

Protection of telegraphs and railways.

56.

Location of underground lines.


Except by permission of the managing director, all underground lines shall be placed on the same side of the street as overhead lines, and on the opposite side of the street to that on which underground or overhead telegraph lines exist.

57.

Location of overhead lines.

(1) Except by permission of the managing director, all overhead lines shall be placed on the opposite side of the street to that on which any telegraph lines exist.
(2) Except by permission of the managing director, no pole or support of an overhead line shall be erected within 30 feet of a telegraph line and no part of any electric supply line shall be placed within 8 feet of a pole or support of a telegraph line.
(3) In running electric supply lines along a public road where no telegraph lines exist, a licensee shall keep to that side of the street which shall be approved by the managing director for that purpose, and in running service lines to the opposite side of the street a licensee shall arrange the lines so as to interfere as little as possible with the route on that side of any future telegraph line.
(4) Where the erection, alteration, addition or operation of any overhead electric supply line necessitates the alteration of any existing telegraph line, and the alteration is approved by the managing director, the expense of the alteration shall be borne by the licensee; except that where existing telegraph lines occupy both sides of a street at any place, the managing director shall bear the cost of putting all telegraph lines on one side of the street, or consent to an arrangement for the joint use of poles on both sides of the street.
58.

Protection of telegraph lines.

(1) All generators shall be designed with a wave form as nearly as possible to the sine wave in order to minimise inductive interference with telegraph lines.

(2) Where an electric supply line runs parallel and adjacent to a telegraph line, suitable and approved transposition of the power wires shall be effected if so required by the managing director, the expense being borne by the licensee.
(3) Overhead lines shall intersect telegraph lines at an angle approximating as closely as practicable to a right angle and, except with the permission of the managing director, not exceeding 135 degrees.
(4) Where an overhead electric supply line at medium or any lower pressure crosses or is adjacent to any telegraph line, the following precautions shall be taken by the licensee or owner— (a) where the telegraph line is an important one, i.e., one which is not erected solely for renting to a subscriber, the licensee or owner shall ensure that sufficient clearance or mechanical protection is maintained between the telegraph line and the electric supply line to prevent physical contact between any part of the telegraph and electric supply lines due to breakage, sagging or any other cause whether the breakage, sagging or other cause originates with the electric supply line or the telegraph line; (b) where the telegraph line is an unimportant one, i.e., one which is erected solely for renting to a subscriber, the physical contact due to breakage, sagging or any other cause originating with either the electric supply line or the telegraph line will only be tolerated if the electric supply line is first reduced to earth potential, or if all conductors of the electric supply line, except an earthed neutral or other earthed conductor, are adequately covered with approved insulating material; and the licensee or owner of the electric supply line shall take immediate steps to remove any physical contact originating with the electric supply line; and (c) wherever possible the electric supply lines shall cross above the telegraph lines.
(5) When an overhead electric supply line at high or extra high pressure crosses or is adjacent to any telegraph line, the licensee or owner shall so arrange and guard the electric supply line that physical contact between the electric supply line and the telegraph line due to breakage, sagging or other cause, whether the breakage, sagging or other cause originates with the electric supply line or the telegraph line, is rendered impossible under all conditions likely to arise.
In no case shall an electric supply line at high or extra high pressure pass beneath a telegraph line.

(6) The licensee or owner of the electric supply line shall submit to the managing director for approval details of any method by which he or she proposes to meet the requirements of subregulation (4) or (5) of this regulation.
(7) The licensee or owner, before erecting an electric supply line which crosses or is adjacent to a telegraph line, shall ascertain from the managing director whether it is “important” or “unimportant”.

(8) The managing director, before erecting a telegraph line which crosses or is adjacent to an electric supply line, shall notify the licensee or owner whether it is “important” or “unimportant”.
(9) The following minimum clearances between conductors of any electric supply line and conductors of any telegraph line shall be maintained under all conditions of temperature and wind pressure— in the case of a medium or any lower pressure electric supply line 2 feet (a) (b) (c) (d) in the case of a high pressure electric supply line 4 feet in the case of an extra high pressure electric supply line not exceeding 11,000 volts in the case of an extra high pressure electric supply line exceeding 11,000 volts 6 feet 8 feet For the purpose of this requirement, auxiliary and earth conductors, stay, suspension and span wires, cradles, guards or other mechanical protection of electric supply lines to give effect to any of the requirements of these Regulations shall be treated as medium pressure electric supply lines.
59.

Notice and approval where telegraph line is operated by other person.

Where telegraph lines are operated and maintained by any person or public authority other than the managing director, the notice and approval required by these Regulations shall be given to and obtained from that person or public authority.

60.

Railway crossings.


(1) No work of any nature shall be erected or constructed upon, over or under any part of the Uganda Railways Corporation until the licensee has obtained the consent of the managing director of the Uganda Railways Corporation to the work.

(2) Where overhead lines cross the railway, the span between the supports shall not exceed 100 feet in length where practicable.

The pole on each side of the railway shall be embedded in concrete where carrying transmission or distribution lines.
(3) The lines over the railway, and for a span each side of the railway, shall be erected with a factor of safety on the basis that the maximum tension in the conductor shall not exceed half the elastic limit of the conductor under the conditions of minimum temperature and wind pressure as specified in regulation 36 of these Regulations.

(4) The minimum clearance above rail level shall be 24 feet for all lines working at low or high pressure and 27 feet for all lines working at extra high pressure.
The dip or sag shall be calculated on the assumption of a maximum temperature of 120EF.

The supports of the line shall have a factor of safety of twice that laid down in regulation 39 of these Regulations under the conditions of wind pressure specified in that regulation.

(5) For any pressure not exceeding the limits of high pressure, the conductors in the crossing-span may be bare or may be insulated.

For extra high pressure the conductors shall be bare.
(6) Telephone wires of the licensee may be run with a minimum clearance above the rails of 24 feet and shall be of galvanised iron or hard- drawn copper of not less than No.

12 S.W.G.

where they cross the railway, and for a clear span on either side.

(7) Where a line at any pressure is erected across a railway the licensee shall take the precautions laid down in regulation 43(1)(a)(ii) of these Regulations.

History: S.I.

135-5.


Cross References British Engineering Standards Association, Specifications.

British Standard Specifications No.

205 (1962).

_____