RUS Bulletin 1728F-806

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TABLE OF CONTENTS

1. General ............................................................................................................................. 1

2. Storage of Material and Equipment ...................................................................................1

3. Handling of Cable ..............................................................................................................2

 4. Plowing .............................................................................................................................2

 5. Special Requirements for Coordination Between Owner and

 Contractor Where Cable is to be Installed by Plowing .......................................................3

6. Trenching ..........................................................................................................................3

7. Installing Cable in Trench .................................................................................................4

 8. Minimum Bending Radius of Cable ...................................................................................5

9. Conduit ..............................................................................................................................5

10. Tagging of Cables at Termination Points .........................................................................5

11. Splices .............................................................................................................................5

12. Primary Cable Termination and Stress Cones ..................................................................5

13. Special Precautions for Cable Splices and Terminations ..................................................6

14. Secondary and Service Connections ................................................................................6

15. Pedestals ..........................................................................................................................6

16. Inspection and Inventory of Buried Units .........................................................................7

17. Backfilling ......................................................................................................................7

18. Equipment Pads................................................................................................................7

19. Transformers....................................................................................................................7

20. Equipment Enclosures......................................................................................................7

21. Utility Safety Signs ..........................................................................................................8

22. Sacrificial Anodes............................................................................................................8

23. Grounding ........................................................................................................................8

24. Cable Location Markers ...................................................................................................8

25. Installed Cable and Acceptance Tests...............................................................................8

Attachment A: Index of Drawings

Attachment B: Construction Drawings

INDEX:

ASSEMBLIES:

Underground Distribution – Bul. 1728F-806

SPECIFICATIONS AND STANDARDS:

Construction Specifications and Drawings – Bul. 1728F-806

Underground Electric Distribution – Bul. 1728F-806

UNDERGROUND DISTRIBUTION:

Underground Rural Distribution – Bul. 1728F-806
Bulletin 1728F-806

1. GENERAL

1.1 These specifications provide for the construction of underground distribution power

facilities as specified by the owner. The owner is the organization contracting for the services

and, when used in connection with RUS financed facilities, is synonymous with the term

borrower as defined in §1710.2.

1.2 It is the responsibility of the borrower to ensure that all construction work shall be

accomplished in a thorough and workmanlike manner in accordance with the staking sheets,

plans and specifications, and the construction drawings.

1.3 If construction work is performed by the Owner's force account crews instead of a

contractor, any reference to "Contractor" apply to the force account crews.

1.4 The provisions of section §1724.50, Compliance with National Electrical Safety Code

(NESC) apply to all borrower electric system facilities regardless of the source of financing.

a. A borrower must ensure that its electric system, including all electric distribution,

transmission, and generating facilities, is designed, constructed, operated, and

maintained in accordance with all applicable provisions of the most current and

accepted criteria of the NESC and all applicable and current electrical and safety

requirements of any State or local government entity. Copies of the NESC may be

obtained from the Institute of Electrical and Electronic Engineers, Inc., 345 East 47th

Street, New York, New York 10017-2394. This requirement applies to the borrower’s

electric system regardless of the source of financing.

b. Any electrical standard requirements established by RUS are in addition to, and not in

substitution for or a modification of, the most current and accepted criteria of the NESC

and any applicable electrical or safety requirements of any State or local governmental

entity.

c. Overhead distribution circuits shall be constructed with not less than the Grade C

strength requirements as described in Section 26, Strength Requirements, of the NESC

when subjected to the loads specified in NESC Section 25, Loadings for Grades B and

C. Overhead transmission circuits shall be constructed with not less than the Grade B

strength requirements as described in NESC Section 26.

2. STORAGE OF MATERIAL AND EQUIPMENT: It is the responsibility of the borrower

to ensure that all material and equipment to be used in construction must be stored so as to be

protected from deteriorating effects of the elements. If outdoor storage cannot be avoided, the

material and equipment must be stacked on supports well above the ground line and protected

from the elements as appropriate, and with due regard to public safety.
Bulletin 1728F-806

Page 2

3. HANDLING OF CABLE: It is the responsibility of the borrower to ensure that the cable

shall be handled carefully at all times to avoid damage, and shall not be dragged across the

ground, fences or sharp projections. Care shall be exercised to avoid excessive bending of the

cable. The borrower shall ensure that the ends of the cable be sealed at all times against moisture

with suitable end caps. Where it is necessary to cut the cable, the ends will be terminated or

sealed immediately after the cutting operation.

4. PLOWING

4.1 When cables are to be installed by plowing, it is the responsibility of the borrower to ensure

that the plowing equipment be subject to the approval of the Owner and the public authorities

having jurisdiction over highway and road rights-of-way. The plow must be provided with a

means to assure positive holddown of the plow blade to provide proper depth at all times.

4.2 The design of the plowshare must ensure that the cable passing through the plow will not be

bent in a radius less than 12 times the outside diameter of the cable. The equipment must be

capable of extending the plow a minimum of 6 inches below the specified depth under all terrain

conditions of plow utilization.

4.3 The borrower must ensure that equipment and construction methods used during

construction cause minimum displacement of the soil. The slot made in the soil by the cable

plows must be closed immediately by driving a vehicle track or wheel over the slot or by other

suitable means.

4.4 Starting and terminating points of the plowing operation must be excavated prior to cable

installation to reduce possible cable damage and to assure sufficient burial depth.

4.5 During the plowing operation, care is to be exercised to feed the cable or wire into the

ground through the plow loosely and at minimum tension. Besides using proper equipment and

construction methods, supervision by the borrower or the borrower’s representative shall be

furnished at all times at the site of plowing operations to assure compliance with these

specifications.

4.6 If, during the plowing operation, the plow should strike a buried object or rock that would

stop the equipment and necessitate removal of the plow from the ground, the plow must be

removed from the ground carefully and, if practical, without backing the plow. If it should be

necessary to back the plow to remove it from the ground, the cable must be uncovered a

sufficient distance back for inspection by the Owner to determine whether the cable or wire has

been damaged.

4.7 The cable must be inspected carefully as it is payed out from the reel to be certain that it is

free from visible defects. Every instance of damaged cable observed at any time, whether prior

to installation, during installation, or when discovered by test or observation subsequent to

installation in plant, shall be immediately called to the attention of the Owner. Repair or

correction of such damage must be completed promptly and in accordance with the written

instruction of the Owner. The location of any such repair must be indicated on the staking sheet.
Bulletin 1728F-806

Page 3

5. SPECIAL REQUIREMENTS FOR COORDINATION BETWEEN OWNER AND

CONTRACTOR WHERE CABLE IS TO BE INSTALLED BY PLOWING

5.1 It is the responsibility of the borrower to ensure that the Contractor and the Owner shall

jointly review the staking sheets prior to the start of construction. At that time, the Contractor

shall propose any desirable changes or clarifications. These changes, if approved by the Owner,

shall be made and recorded on the staking sheets. No changes on the staking sheets shall be

made by the Contractor without the prior written approval of the Owner. A representative of the

Owner shall remain in the immediate vicinity of the plowing operations at all times and shall

consider and possibly approve any acceptable changes proposed by the Contractor. A

representative of the Owner shall also inspect any damage to cable and approve acceptable

methods of repair or correction of such damage in accordance with the provisions of these

specifications.

5.2 In the event that rock is encountered during the plowing operation so that the buried cable

cannot be installed to the required minimum depths in soil, the Contractor shall determine for the

Owner the nature and extent of the rock encountered. Based on this information, the Owner shall

determine whether the cable is to be rerouted, trenched in rock or a change made to aerial

construction. This decision shall be made promptly, and appropriate changes in units shall be

made on the staking sheets. Such changes shall be in writing, dated, and initialed by the Owner.

5.3 Due to the necessity of making on-the-spot corrections and changes on staking sheets, it may

not be possible for the Owner to issue revised staking sheets to the Contractor in all cases. When

changes are made, dated, and initialed by the Owner on a set of the Contractor's staking sheets, it

shall be the Contractor's responsibility to transfer these changes to all other sets of staking sheets

being used by the Contractor for construction purposes.

5.4 The Contractor shall provide a competent representative to work with the Owner on the

inventory and inspection of buried cable units. The inventory of buried cable will be made as

soon after the plowing operation as practical to avoid later disagreements on the quantity of cable

installed when changes are required in the project.

6. TRENCHING

6.1 It is the responsibility of the borrower to ensure that all trenching depths specified are

minimum as measured from the final grade to the top surface of the cable. The routing must be

as shown on the staking sheets and plans and specifications unless conditions encountered are

such that changes are necessary to accomplish the work. In such event, the Owner shall be

notified promptly. If rock or other difficult digging is involved, the Contractor shall determine

the nature and extent of the difficulty, and the Owner shall determine whether rerouting, rock

trenching, plowing or other changes are necessary. Loose soil or crumbly rock shall not be

considered as "difficult digging." The trench widths specified are minimum and should be

increased as necessary to obtain the required depths in loose soils.
Bulletin 1728F-806

Page 4

6.2 Where trenches are intended for more than one cable, particular care must be taken to

provide for extra depth and width to allow for soil falling into the trench during the laying of the

first cables.

6.3 Care shall be exercised to minimize the likelihood of waterflow since this may cause trench

damage and reduction in trench depth. If this occurs, the trench must be cleared to the specified

depth before installing the cable.

6.4 All trenches must follow straight lines between staked points to the greatest extent possible.

Secondary and service trenches must extend in a straight line from takeoff points wherever

possible. The trenches must be dug so that the bottom has a smooth grade. Large rocks, stones

and gravel in excess of l inch must be removed from the bottom of the trench. Where this cannot

be accomplished, a 2 inch bed of sand or clean soil must be placed in the bottom of the trench.

6.5 Construction shall be arranged so that trenches may be left open for the shortest practical

time to avoid creating a hazard to the public and to minimize the likelihood of collapse of the

trench due to other construction activity, rain, accumulation of water in the trench, etc.

7. INSTALLING CABLE IN TRENCH

7.1 It is the responsibility of the borrower to ensure that the cable must be placed in the trench as

soon after the trenching operation as feasible. Wherever possible, cable must be payed out from

the reel mounted on a moving vehicle or trailer. The reel must be supported so that it can turn

easily without undue strain on the cable. The cable must be carefully placed in the trench by

hand. All cable placement will be done under constant supervision by the borrower or the

borrower’s representative who assure that no damage to the cable occurs.

7.2 The cable must be inspected carefully as it is removed from the reel in laying operations to

be certain that it is free from visible defects. The Owner shall decide upon corrective action

when defects are discovered.

7.3 Where more than one cable is to be placed in a trench, the spacings required by the

specifications must be observed. Care must be taken that any soil falling into the trench during

the laying of the first cable does not reduce the clearances of the last cable below that specified.

Should this occur, the excess soil must be removed carefully by hand or with equipment that will

not damage the installed cables.

7.4 Sufficient slack, and in no case less than 24 inches, must be left at all risers, transformer

pads, pedestals and terminal points so that movements of cable after backfilling will not cause

damaging strain on the cable or terminals. The cable trench must be mechanically compacted at

least 36 inches from all riser poles, pads, pedestals and terminal points.

7.5 The ends of all secondary cable terminated below ground must be long enough to reach at

least 12 inches above the top of the underground enclosure.
Bulletin 1728F-806

Page 5

8. MINIMUM BENDING RADIUS OF CABLE: It is the responsibility of the borrower to

ensure that the minimum bending radius of primary cable is 12 times the overall diameter of the

cable. The minimum bending radius of secondary and service cable is six times the overall

diameter of the cable. In all cases the minimum radius specified is measured to the surface of the

cable on the inside of the bend. Cable bends must not be made within 6 inches of a cable

terminal base.

9. CONDUIT: It is the responsibility of the borrower to ensure that all exposed ends of conduit

must be plugged during construction to prevent the entrance of foreign matter and moisture into

the conduit. Burrs or sharp projections which might injure the cable must be removed. Riser

shield or conduit must extend at least 18 inches below grade at all riser poles. If full round

conduit is used as a riser shield, an end bell must be installed on the lower end to prevent damage

to the cable.

10. TAGGING OF CABLES AT TERMINATION POINTS: As the cables are laid, it is the

responsibility of the borrower to ensure that they must be identified and tagged. The

identification must be of a permanent type, such as that done on plastic or corrosion resistant

metal tags. The tag must be securely attached to the cable. Paper or cloth tags are not

acceptable.

11. SPLICES

11.1 It is the responsibility of the borrower to ensure that cable splices must be of the premolded rubber, heat-shrink, or cold-shrink type, of the correct voltage rating and must be

installed in accordance with the splice manufacturer's instructions. Splices that depend solely on

tape for a moisture barrier must not be used.

11.2 Not more than one splice may be permitted for each 2000 feet of cable installed unless

authorized by the Owner. No bends may be permitted within 12 inches of the ends of a splice.

The cable or circuit numbers and the exact location of all splices must be noted on the staking

sheets (as built).

12. PRIMARY CABLE TERMINATION AND STRESS CONES: It is the responsibility of

the borrower to ensure that prefabricated stress cones or terminations must be installed in

accordance with the manufacturer's instructions at all primary cable terminals. They must be

suitable for the size and type of cable that they are used with and for the environment in which

they will operate. Any indication of misfit, such as a loose or exceptionally tight fit, must be

called to the Owner's attention. The outer conductive surface of the termination must be bonded

to the system neutral. A heat-shrink or cold-shrink sleeve must be installed to seal between the

body of the termination and the cable jacket.
Bulletin 1728F-806

Page 6

13. SPECIAL PRECAUTIONS FOR CABLE SPLICES AND TERMINATIONS: It is the

responsibility of the borrower to ensure that a portable covering or shelter must be available for

use when splices or terminations are being prepared and when prefabricated terminations are

being switched. The shelter must be used as necessary to keep rain, snow and windblown dust

off the insulating surfaces of these devices. Since cleanliness is essential in the preparation and

installation of primary cable fittings, care shall be exercised to prevent the transfer of conducting

particles from the hands to insulating surfaces. Mating surfaces must be wiped with a solvent

such as denatured alcohol to remove any possible accumulation of dirt, moisture or other

conducting materials. A silicone grease or similar lubricant should be applied afterwards in

accordance with the manufacturer's recommendations. Whenever prefabricated cable devices are

opened, the unenergized mating surfaces must be lubricated with silicone grease before the

fittings are reconnected.

14. SECONDARY AND SERVICE CONNECTIONS

14.1 It is the responsibility of the borrower to ensure that a suitable inhibiting compound must

be used with all secondary and service connections.

14.2 All secondary cable connections located below grade or in secondary pedestals must be

made with pre-insulated secondary connector blocks. Diving bells with open terminals,

insulating boots or moisture barriers that depend solely on tape are not acceptable.

14.3 All transformer secondary phase terminal connections must be completely insulated. If the

secondary phase terminals are threaded studs, the connection must be made with a pre-insulated

secondary transformer connection block. If the transformer secondary phase terminals are

insulated cable leads, connection must be made with a pre-insulated secondary connector block

or with a secondary prefabricated splice when the transformer leads continue directly to the

service.

14.4 If a transformer is so large that it must have secondary spades, the spades must be taped or

otherwise insulated. Boots used for insulation must be taped so that they cannot be readily

slipped off.

14.5 Secondary connections to terminals of pole-mounted transformers must be made so that

moisture cannot get inside the cable insulation. This may be accomplished by covering the

terminals and bare conductor ends with an appropriate moisture sealant or providing a drip loop.

14.6 The secondary connections and insulation must have accommodations for all future and

existing services as shown on the plans and specifications.

15. PEDESTALS: Where required, it is the responsibility of the borrower to ensure that

pedestal stakes must be driven vertically into the bottom of the trench before cables are placed,

and shall be located as shown on the staking sheets. Pedestal posts and supporting stakes must

be in place before the cable is installed. All pedestals should be approximately at the same

height above finished grade.
Bulletin 1728F-806

Page 7

16. INSPECTION AND INVENTORY OF BURIED UNITS: Before any backfilling

operations are begun, it is the responsibility of the borrower to ensure that the Contractor and

Owner shall jointly inspect all trenches, cable placement, risers, pedestal stakes, and other

construction that will not be accessible after backfilling, and an inventory of units shall be taken.

If corrections are required, a second inspection shall be made after completion of the changes.

17. BACKFILLING

17.1 It is the responsibility of the borrower to ensure that the first 6 inches of trench backfill

shall be free from rock, gravel or other material which might damage the cable jacket. In lieu of

cleaning the trench, the Contractor may, at the Contractor's option, place a 2 inch bed of clean

sand or soil under the cable and 4 inches of clean soil above the cable. Cleaned soil backfill

when used shall contain no solid material larger than l inch. This soil layer must be carefully

compacted so that the cable will not be damaged.

17.2 Backfilling must be completed in such a manner that voids will be minimized. Excess soil

must be piled on top and must be well tamped. All rock and debris must be removed from the

site, and any damage to the premises repaired immediately.

17.3 Pieces of scrap cable or other material remaining after installation must not be buried in the

trench as a means of disposal.

18. EQUIPMENT PADS: It is the responsibility of the borrower to ensure that the site for the

pad shall be on undisturbed earth adjacent to but not over the trench. The site shall be cleared of

all debris and excavated to the specified depth. Gravel or sand may be added to the site and

thoroughly compacted. The pad shall be installed level at the specified elevation.

19. TRANSFORMERS: It is the responsibility of the borrower to ensure that transformers

shall be handled carefully to avoid damage to the finish and shall be positioned in accordance

with the staking sheets and the plans and specifications. Only qualified and experienced

personnel shall be allowed to make connections and cable terminations.

20. EQUIPMENT ENCLOSURES: It is the responsibility of the borrower to ensure that

excavations for sleeve-type transformer pads and other below-grade enclosures shall be made so

as to disturb the surrounding earth as little as practical. Enclosures shall be installed with side

walls plumb. When enclosures are of fiber, plastic, or other semiflexible material, backfilling

should be done with covers in place and with careful tamping so as to avoid distortion of the

enclosure. When installation is complete, the cover of the enclosure shall not be lower than and

not more than 2 inches higher than the grade specified by the Owner. Soil in the immediate

vicinity shall be tamped and sloped away from the enclosure. At the Owner's option, the excess

soil shall be removed from the site or spread evenly over the surface of the ground to the

satisfaction of the Owner.
Bulletin 1728F-806

Page 8

21. UTILITY SAFETY SIGNS: It is the responsibility of the borrower to ensure that utility

safety signs must be in accordance with ANSI Z535.2, Environmental and Facility Safety Signs,

and shall be applied in accordance with RUS drawings. Copies of the ANSI Z535.2 may be

obtained from the National Electrical Manufacturers Association (NEMA), 1300 North 17th

Street, Suite 1847, Rosslyn, Virginia 22209.

22. SACRIFICIAL ANODES: It is the responsibility of the borrower to ensure that sacrificial

anodes specified shall be installed with backfill package intact and connecting leads positioned

for proper connection after the equipment is in place. Anodes shall neither be moved,

positioned, lifted, nor lowered into place by pulling on the connecting leads.

23. GROUNDING

23.1 It is the responsibility of the borrower to ensure that all neutral conductors, grounding

electrodes, sacrificial anodes and groundable parts of equipment shall be interconnected. All

interconnections shall be made as shown on the construction drawings. A copper-clad or

galvanized steel ground rod with minimum length of 8 feet shall be installed at all equipment

locations as shown in the construction drawings and at all cable splices and taps.

23.2 All pad-mounted equipment enclosures, including transformers, shall be grounded in such a

manner that two separate grounding paths exist between the enclosure and the grounding rod(s).

24. CABLE LOCATION MARKERS: It is the responsibility of the borrower to ensure that

location of permanent cable markers shall be as shown on the staking sheets.

25. INSTALLED CABLE AND ACCEPTANCE TESTS

25.1 It is the responsibility of the borrower to ensure that:

a. Continuity: After installation of the cable and prior to the high potential test specified

below, authorized personnel shall perform a simple continuity test on the system. This

can easily be accomplished by grounding the conductor at the source and checking for

continuity from the end of each tap with an ohmmeter or with a battery and ammeter.

b. High Potential: After successful continuity tests, authorized personnel should perform

high potential tests on each length of cable, with terminations in place but disconnected

from the system.
Bulletin 1728F-806

Page 9

25.2 The installation shall withstand for a minimum of 15 minutes a DC test potential as

follows:

 Primary URD Cable

 (XLP-TR, and EPR)

 Insulation Field DC

 Thickness Acceptance

Rated Voltage Inches Test Voltage

15 kV .220 64.0 kV

25 kV .260 80.0 kV

25 kV .345 100.0 kV

The voltage may either be increased continuously or in steps to the maximum test value:

a. If increased continuously, the rate of increase of test voltage should be approximately

uniform and increasing to maximum voltage in not less than 10 seconds and in not

more than approximately 60 seconds.

b. If applied in steps, the rate of increase of test voltage from one step to the next should

be approximately uniform. The duration at each step shall be long enough for the

absorption current to attain reasonable stabilization (l minute minimum). Current and

voltage readings should be taken at the end of each step duration. The number of steps

should be from five to eight.

25.3 Warning: A hazardous voltage may still exist on the cable after the above testing has been

completed. Therefore, before handling the cable, it is the responsibility of the borrower to

ensure that the conductor shall be grounded to permit any charge to drain to earth.
Bulletin 1728F-806

Attachment A

Page 10

Attachment A

INDEX OF DRAWINGS

Primary Terminal Pole Assemblies:

UA1 Single Phase Cable Deadend Terminal Pole

UA2 Single Phase Cable Deadend Terminal Pole

UA3 Single Phase Cable Tangent Terminal Pole

UB1 Vee-Phase Cable Terminal Pole with Cutouts and

Crossarm Mounting Arresters

UB2 Vee-Phase Cable Terminal Pole with Cutouts and

Bracket Mounting Arresters

UB3 Vee-Phase Cable Terminal Pole without Cutout, with

Crossarm Mounting Arresters

UB4 Vee-Phase Cable Terminal Pole without Cutout, with

Bracket Mounting Arresters

UC1 Three Phase Cable Terminal Pole with Cutouts and

Crossarm Mounting Arresters

UC2 Three Phase Cable Terminal Pole with Cutouts and

Bracket Mounting Arresters

UC2-1 Three Phase Cable Deadend Terminal Pole

UC2-2 Three Phase Cable Tangent Terminal Pole

UC5-1 Three Phase Cable Deadend Terminal Pole with

Disconnect Switches

UC6-1 Three Phase Cable Tangent Terminal Pole with

Disconnect Switches
Bulletin 1728F-806

Attachment A

Page 11

Transformer Assemblies:

UG6, Single Phase Pad-Mounted Transformer (Radial Feed)

UG6B,

UG7, Single Phase Pad Mounted Transformer (Loop Feed)

UG7B

UG17, Three Phase Pad Mounted Transformer (Radial Feed)

UG17B

UG17-2, Three Phase Pad Mounted Transformer (Loop Feed)

UG17-2B

UG17-3, Three Phase Pad Mounted Loop Feed Transformer with

UG17-3B Radial Feed

Secondary Assemblies:

UJ1, Secondary Connector Blocks

UJ2

UK5 Secondary Pedestal Underground Cable

UK6 Secondary Handhole Underground Cable

Pad Assemblies:

UM1-5C, Pad Assemblies

UM1-5NC

UM1-6C Three Phase Transformer Concrete Pads

UM1-7C, Ground Sleeve Assembly

UM1-7NC

Sectionalizing Assemblies:

UM3-14 Single Phase Sectionalizing Enclosure

UM3-44, Single Phase Pad Mounted Sectionalizer or Recloser

UM3-45

UM3-46 Three, Single Phase Pad Mounted Reclosers
Bulletin 1728F-806

Attachment A

Page 12

UM3E Fuse/Switch Enclosure Installation

UM3E-1, Single Pole Switching 200 AMP Fuse Enclosure

UM3E-2 Installation Wiring Diagrams (Single Phase and

Two Phase)

UM3E-3 Fuse Enclosure (200 - 600 AMP) Wiring Diagrams

(Three Phase)

Secondary Terminal Pole Assemblies:

UM5 Secondary Cable Terminal Pole

UM5-6, Secondary Cable Terminal to Meter Base

UM5-6A

Miscellaneous Accessories:

UM6-1 – UM6-8 Miscellaneous Accessories

Regulator Assembly:

UM7-1 Single Phase Regulator Assembly with By-Pass

Switching Function Underground to Underground

Metering Assemblies:

UM8 Meter Installation Underground Source

UM8-2 Meter Pedestal Wood Post

UM8-3 Trough Type Meter Pedestal

UM8-3A

UM8-4, Meter & Switch Installation Underground Source

UM8-4A

UM8-5 Pad Mounted Switch Installation Underground Source

UM8-6 C.T. Meter Installation Single Phase

UM8-7 C.T. Meter Installation Three Phase
Bulletin 1728F-806

Attachment A

Page 13

Miscellaneous Assemblies:

UM9-2 Pad Mounted Switched Capacitor Enclosure

UM12 Cable Route Marker

Corrosion Control Assemblies:

UM27-1 Sacrificial Anode for Cable Splice Protection

(Bare to Jacketed Cable)

UM27-2 Sacrificial Anode for Equipment Ground Protection

UM27-3 Sacrificial Anode for Cable Ground Protection

UM28 Test Station

Sectionalizing Assembly:

UM33 Multi Phase Sectionalizing Enclosure Pad or Sleeve

Mounted

Grounding Assemblies:

UM48-1 Grounding Assembly for Pad Mounted Single Phase

Transformers and Enclosures

UM48-2 Grounding Assembly for Pad Mounted Multi Phase

Transformers and Enclosures

UM48-3 Grounding Assembly for Underground Primary Cable

UM48-4 Grounding Assembly for Underground Primary Cable

(with Test Station)

UM48-5 Grounding Grid for Pad Mounted Equipment

Installation

UM48-6 Grounding Array for Pad Mounted Equipment

Installation

Conduit and Trenching Assemblies:

UR2 to Trenches for Direct Burial Cables

UR2-2
Bulletin 1728F-806

Attachment A

Page 14

UR2-3 to Trenches for Direct Burial Cables

UR2-5

UR2-NT Trenches for Direct Burial Cable

UR2-ST

Guideline Drawings:

UX1 Open Delta Connection with Single Phase Pad Mount

Transformers

UX2 Single Phase Pad Mounted Transformer Deferred Unit

Pedestal Type

UX3 Single Phase Padmounted Transformer Deferred Unit

Pad-Sleeve Type

UX4 Installation of Neutral Connection in Above Grade

Pedestal

UX5 Sectionalizing Pedestal Grounding

UX7 Location Methods for Below Grade Enclosure

UX8 Temporary Primary or Secondary Cable Termination

 for Future Use

UX11 Connection of Terminator/Arrester to Overhead Line
Bulletin 1728F-806

Attachment B

Page 15

Attachment B

Construction Drawings