reglab/statecodes huggingface dataset:
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart E - Combustible Material and Rock Dusting › Section 75.400-1 - Definitions

Current through July 13, 2024
(a) The term "coal dust" means particles of
				  coal that can pass a No. 20 sieve.
(b) The term "float coal dust" means the coal
				  dust consisting of particles of coal that can pass a No. 200 sieve.
(c) The term "loose coal" means coal
				  fragments larger in size than coal dust.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart E - Combustible Material and Rock Dusting › Section 75.400-2 - Cleanup program

Current through July 13, 2024
A program for regular cleanup and removal of accumulations
					 of coal and float coal dusts, loose coal, and other combustibles shall be
					 established and maintained. Such program shall be available to the Secretary or
					 authorized representative and the State Mine Inspector.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart E - Combustible Material and Rock Dusting › Section 75.401 - Abatement of dust; water or water with a wetting agent

Current through July 13, 2024
[Statutory Provision]
Where underground mining operations in active workings
					 create or raise excessive amounts of dust, water or water with a wetting agent
					 added to it, or other no less effective methods approved by the Secretary or
					 his authorized representative, shall be used to abate such dust. In working
					 places, particularly in distances less than 40 feet from the face, water, with
					 or without a wetting agent, or other no less effective methods approved by the
					 Secretary or his authorized representative, shall be applied to coal dust on
					 the ribs, roof, and floor to reduce dispersibility and to minimize the
					 explosion hazard.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart E - Combustible Material and Rock Dusting › Section 75.401-1 - Excessive amount of dust

Current through July 13, 2024
The term "excessive amounts of dust" means coal and float
					 coal dust in the air in such amounts as to create the potential of an explosion
					 hazard.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart E - Combustible Material and Rock Dusting › Section 75.402 - Rock dusting

Current through July 13, 2024
[Statutory Provision]
All underground areas of a coal mine, except those areas in
					 which the dust is too wet or too high in incombustible content to propagate an
					 explosion, shall be rock dusted to within 40 feet of all working faces, unless
					 such areas are inaccessible or unsafe to enter or unless the Secretary or his
					 authorized representative permits an exception upon his finding that such
					 exception will not pose a hazard to the miners. All crosscuts that are less
					 than 40 feet from a working face shall also be rock dusted.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart E - Combustible Material and Rock Dusting › Section 75.402-1 - Definition

Current through July 13, 2024
The term "too wet" means that sufficient natural moisture
					 is retained by the dust that when a ball of finely divided material is squeezed
					 in the hands water is exuded.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart E - Combustible Material and Rock Dusting › Section 75.402-2 - Exceptions

Current through July 13, 2024
Exceptions granted under S 75.402 by the Secretary or his
					 authorized representative shall be reviewed periodically.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart E - Combustible Material and Rock Dusting › Section 75.403 - Maintenance of incombustible content of rock dust

Current through July 13, 2024
[Statutory Provision]
Where rock dust is required to be applied, it shall be
					 distributed upon the top, floor, and sides of all underground areas of a coal
					 mine and maintained in such quantities that the incombustible content of the
					 combined coal dust, rock dust, and other dust shall be not less than 65 per
					 centum, but the incombustible content in the return aircourses shall be no less
					 than 80 per centum. Where methane is present in any ventilating current, the
					 per centum of incombustible content of such combined dusts shall be increased
					 1.0 and 0.4 per centum for each 0.1 per centum of methane where 65 and 80 per
					 centum, respectively, of incombustibles are required.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart E - Combustible Material and Rock Dusting › Section 75.403-1 - Incombustible content

Current through July 13, 2024
Moisture contained in the combined coal dust, rock dust and
					 other dusts shall be considered as a part of the incombustible content of such
					 mixture.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart E - Combustible Material and Rock Dusting › Section 75.404 - Exemption of anthracite mines

Current through July 13, 2024
[Statutory Provision]
Sections
					 75.401,
					 75.402,
					 and
					 75.403
					 shall not apply to underground anthracite mines.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart F - Electrical Equipment-General › Section 75.500 - Permissible electric equipment

Current through July 13, 2024
[Statutory Provision]
On and after March 30, 1971:
(a) All junction or distribution boxes used
				  for making multiple power connections inby the last open crosscut shall be
				  permissible;
(b) All handheld
				  electric drills, blower and exhaust fans, electric pumps, and such other low
				  horsepower electric face equipment as the Secretary may designate on or before
				  May 30, 1970, which are taken into or used inby the last open crosscut of any
				  coal mine shall be permissible;
(c)
				  All electric face equipment which is taken into or used inby the last open
				  crosscut of any coal mine classified under any provision of law as gassy prior
				  to March 30, 1970, shall be permissible; and
(d) All other electric face equipment which
				  is taken into or used inby the last crosscut of any coal mine, except a coal
				  mine referred to in S 75.501, which has not been classified under any provision
				  of law as a gassy mine prior to March 30, 1970, shall be permissible.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart F - Electrical Equipment-General › Section 75.500-1 - Other low horsepower electric face equipment

Current through July 13, 2024
Other low horsepower electric face equipment designated
					 pursuant to the provisions of S 75.500(b) is all other electric-driven mine
					 equipment, except low horsepower rock dusting equipment, and employs an
					 electric current supplied by either a power conductor or battery and consumes
					 not more than 2,250 watts of electricity and which is taken into or used inby
					 the last open crosscut.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart F - Electrical Equipment-General › Section 75.501 - Permissible electric face equipment; coal seams above water table

Current through July 13, 2024
[Statutory Provision]
On and after March 30, 1974, all electric face equipment,
					 other than equipment referred to in paragraph (b) of S 75.500, which is taken
					 into and used inby the last open crosscut of any coal mine which is operated
					 entirely in coal seams located above the water table and which has not been
					 classified under any provision of law as a gassy mine prior to March 30, 1970,
					 and in which one or more openings were made prior to December 30, 1969, shall
					 be permissible.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart F - Electrical Equipment-General › Section 75.501-1 - Coal seams above the water table

Current through July 13, 2024
As used in S 75.501, the phrase "coal seams above the water
					 table" means coal seams in a mine which are located at an elevation above a
					 river or the tributary of a river into which a local surface water system
					 naturally drains.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart F - Electrical Equipment-General › Section 75.501-2 - Permissible electric face equipment

Current through July 13, 2024
(a) On and after
				  March 30, 1971, in mines operated entirely in coal seams which are located at
				  elevations above the water table:
(1) All
				  junction or distribution boxes used for making multiple power connections inby
				  the last open crosscut shall be permissible; and
(2) All handheld electric drills, blower and
				  exhaust fans, electric pumps, and all other electric-driven mine equipment,
				  except low horsepower rock dusting equipment, that employs an electric current
				  supplied by either a power conductor or battery and consumes not more than
				  2,250 watts of electricity, which is taken into or used inby the last open
				  crosscut shall be permissible.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart F - Electrical Equipment-General › Section 75.501-3 - New openings; mines above water table and never classed gassy

Current through July 13, 2024
(a) Where a new opening(s) is proposed to be
				  developed by shaft, slope, or drift from the surface to, or in, any coalbed and
				  the operator considers such proposed new opening(s) to be a part of a mine
				  coming under section 305(a)(2) of the Act and S75.501 the operator shall so
				  notify the District Manager for the District in which the mine is located and
				  the State Mine Inspector in writing prior to the date any actual development
				  (in coal) through such opening(s) is undertaken. Such notification shall
				  include the following information:
(1) Name,
				  address, and identification number of the existing mine.
(2) A current map of the existing mine
				  clearly setting out the proposed new opening(s), mining plan and planned
				  interconnection, if any, with existing workings.
(3) A statement as to when the operator
				  obtained the right to mine the coal which the proposed new opening(s) will
				  traverse.
(4) The name of the
				  coalbeds currently being mined and those which the new opening(s) will
				  traverse.
(5) The expected life of
				  the mine.
(6) The reason(s) for the
				  proposed new opening(s) (for example, haulage, ventilation, drainage, to avoid
				  bad roof, escapeway). The District Manager shall require submission of any
				  additional information he considers pertinent.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart F - Electrical Equipment-General › Section 75.502 - Permits for noncompliance

Current through July 13, 2024
An operator need not comply with paragraph (d) of S 75.500
					 or with S 75.501 during the period of time specified in a permit issued by the
					 Interim Compliance Panel established by the Act.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart F - Electrical Equipment-General › Section 75.503 - Permissible electric face equipment; maintenance

Current through July 13, 2024
[Statutory Provisions]
The operator of each coal mine shall maintain in
					 permissible condition all electric face equipment required by SS 75.500,
					 75.501, 75.504 to be permissible which is taken into or used inby the last open
					 crosscut of any such mine.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart F - Electrical Equipment-General › Section 75.503-1 - Statement listing all electric face equipment

Current through July 13, 2024
Each operator of a coal mine shall complete and file Mine
					 Safety and Health Administration Form No. 6-1496 entitled "Coal Operator's
					 Electrical Survey" and Form 6-1496 Supplemental entitled "Operator's Survey of
					 Electrical Face Equipment." Forms may be obtained from any Coal Mine Safety
					 District Office or Subdistrict Office of the Mine Safety and Health
					 Administration. Separate forms shall be filed for each mine. Copies one and two
					 of the completed form shall be filed with the Coal Mine District or Subdistrict
					 Manager for the district in which each mine is located on or before May 30,
					 1970. An operator must list all electric face equipment being used at each mine
					 as of the time of filing, all such equipment being repaired, and all standby
					 electric equipment stored at or in the mine which the operator intends to use
					 as face equipment.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart F - Electrical Equipment-General › Section 75.504 - Permissibility of new, replacement, used, reconditioned, additional, and rebuilt electric face equipment

Current through July 13, 2024
On and after March 30, 1971, all new, replacement, used,
					 reconditioned, and additional electric face equipment used in any mine referred
					 to in SS 75.500, 75.501, and 75.503 shall be permissible and shall be
					 maintained in a permissible condition, and in the event of any major overhaul
					 of any item of electric face equipment in use on or after March 30, 1971, such
					 equipment shall be put in, and thereafter maintained in, a permissible
					 condition, unless in the opinion of the Secretary, such equipment or necessary
					 replacement parts are not available.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart F - Electrical Equipment-General › Section 75.505 - Mines classed gassy; use and maintenance of permissible electric face equipment

Current through July 13, 2024
[Statutory Provision]
Any coal mine which, prior to March 30, 1970, was classed
					 gassy under any provision of law and was required to use permissible electric
					 face equipment and to maintain such equipment in a permissible condition shall
					 continue to use such equipment and to maintain such equipment in such
					 condition.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart F - Electrical Equipment-General › Section 75.506-1 - Electric face equipment; permissible condition; maintenance requirements

Current through July 13, 2024
(a) Except as provided in paragraph (b) of
				  this section, electric face equipment which meets the requirements for
				  permissibility set forth in S 75.506 will be considered to be in permissible
				  condition only if it is maintained so as to meet the requirements for
				  permissibility set forth in the Bureau of Mines schedule under which such
				  electric face equipment was initially approved, or, if the equipment has been
				  modified, it is maintained so as to meet the requirements of the schedule under
				  which such modification was approved.
(b) Electric face equipment bearing the
				  Bureau of Mines approval number listed in Appendix A of this subpart will be
				  considered to be in permissible condition only if it is maintained so as to
				  meet the requirements for permissibility set forth in Bureau of Mines Schedule
				  2D or, if such equipment has been modified, it is maintained so as to meet the
				  requirements of the schedule under which the modification was
				  approved.
(c) Notwithstanding the
				  provisions of paragraphs (a) and (b) of this section, where the minimum
				  requirements for permissibility set forth in the appropriate Bureau of Mines
				  schedule under which such equipment or modifications were approved have been
				  superseded by the requirements of this part 75, the latter requirements shall
				  be applicable.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart F - Electrical Equipment-General › Section 75.507 - Power connection points

Current through July 13, 2024
[Statutory Provisions]
Except where permissible power connection units are used,
					 all power-connection points outby the last open crosscut shall be in intake
					 air.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart F - Electrical Equipment-General › Section 75.507-1 - Electric equipment other than power-connection points; outby the last open crosscut; return air; permissibility requirements

Current through July 13, 2024
(a) All electric equipment, other than
				  power-connection points, used in return air outby the last open crosscut in any
				  coal mine shall be permissible except as provided in paragraphs (b) and (c) of
				  this section.
(b) Notwithstanding
				  the provisions of paragraph (a) of this section, in any coal mine where
				  nonpermissible electric face equipment may be taken into or used inby the last
				  open crosscut until March 30, 1974, such nonpermissible electric face equipment
				  may be used in return air outby the last open crosscut.
(c) Notwithstanding the provisions of
				  paragraph (a) of this section, in any coal mine where a permit for
				  noncompliance is in effect, nonpermissible electric face equipment specified in
				  such permit for noncompliance may be used in return air outby the last open
				  crosscut for the duration of such permit.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart F - Electrical Equipment-General › Section 75.508 - Map of electrical system

Current through July 13, 2024
[Statutory Provisions]
The location and the electrical rating of all stationary
					 electric apparatus in connection with the mine electric system, including
					 permanent cables, switchgear, rectifying substations, transformers, permanent
					 pumps, and trolley wires and trolley feeder wires, and settings of all
					 direct-current circuit breakers protecting underground trolley circuits, shall
					 be shown on a mine map. Any changes made in a location, electric rating, or
					 setting shall be promptly shown on the map when the change is made. Such map
					 shall be available to an authorized representative of the Secretary and to the
					 miners in such mine.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart F - Electrical Equipment-General › Section 75.508-1 - Mine tracks

Current through July 13, 2024
When mine track is used as a conductor of a trolley system,
					 the location of such track shall be shown on the map required by S 75.508, with
					 a notation of the number of rails and the size of such track expressed in
					 pounds per yard.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart F - Electrical Equipment-General › Section 75.508-2 - Changein electric system map; recording

Current through July 13, 2024
Changes made in the location, electrical rating or setting
					 within the mine electrical system shall be recorded on the map of such system
					 no later than the end of the next workday following completion of such
					 changes.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart F - Electrical Equipment-General › Section 75.509 - Electric power circuit and electric equipment; deenergization

Current through July 13, 2024
[Statutory Provisions]
All power circuits and electric equipment shall be
					 deenergized before work is done on such circuits and equipment, except when
					 necessary for trouble shooting or testing.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart F - Electrical Equipment-General › Section 75.510 - Energized trolley wires; repair

Current through July 13, 2024
[Statutory Provisions]
Energized trolley wires may be repaired only by a person
					 trained to perform electrical work and to maintain electrical equipment and the
					 operator of a mine shall require that such person wear approved and tested
					 insulated shoes and wireman's gloves.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart F - Electrical Equipment-General › Section 75.510-1 - Repair of energized trolley wires; training

Current through July 13, 2024
The training referred to in S 75.510 must include training
					 in the repair and maintenance of live trolley wires, and in the hazards
					 involved in making such repairs, and in the limitations of protective clothing
					 used to protect against such hazards.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart F - Electrical Equipment-General › Section 75.511 - Low-, medium-, or high-voltage distribution circuitand equipment; repair

Current through July 13, 2024
[Statutory Provision]
No electrical work shall be performed on low-, medium-, or
					 high-voltage distribution circuits or equipment, except by a qualified person
					 or by a person trained to perform electrical work and to maintain electrical
					 equipment under the direct supervision of a qualified person. Disconnecting
					 devices shall be locked out and suitably tagged by the persons who perform such
					 work, except that in cases where locking out is not possible, such devices
					 shall be opened and suitably tagged by such persons. Locks or tags shall be
					 removed only by the persons who installed them or, if such persons are
					 unavailable, by persons authorized by the operator or his
					 agent.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart F - Electrical Equipment-General › Section 75.511-1 - Qualified person

Current through July 13, 2024
To be a qualified person within the meaning of S 75.511, an
					 individual must meet the requirements of S 75.153.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart F - Electrical Equipment-General › Section 75.512 - Electric equipment; examination, testing and maintenance

Current through July 13, 2024
[Statutory Provision]
All electric equipment shall be frequently examined,
					 tested, and properly maintained by a qualified person to assure safe operating
					 conditions. When a potentially dangerous condition is found on electric
					 equipment, such equipment shall be removed from service until such condition is
					 corrected. A record of such examinations shall be kept and made available to an
					 authorized representative of the Secretary and to the miners in such
					 mine.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart F - Electrical Equipment-General › Section 75.512-1 - Qualified person

Current through July 13, 2024
To be a qualified person within the meaning of S 75.512, an
					 individual must meet the requirements of S 75.153.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart F - Electrical Equipment-General › Section 75.512-2 - Frequency of examinations

Current through July 13, 2024
The examinations and tests required by S 75.512 shall be
					 made at least weekly. Permissible equipment shall be examined to see that it is
					 in permissible condition.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart F - Electrical Equipment-General › Section 75.513 - Electric conductor; capacity and insulation

Current through July 13, 2024
[Statutory Provision]
All electric conductors shall be sufficient in size and
					 have adequate current carrying capacity and be of such construction that a rise
					 in temperature resulting from normal operation will not damage the insulating
					 materials.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart F - Electrical Equipment-General › Section 75.513-1 - Electric conductor; size

Current through July 13, 2024
An electric conductor is not of sufficient size to have
					 adequate carrying capacity if it is smaller than is provided for in the
					 National Electric Code, 1968. In addition, equipment and trailing cables that
					 are required to be permissible must meet the requirements of the appropriate
					 schedules of the Bureau of Mines.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart F - Electrical Equipment-General › Section 75.514 - Electrical connection or splices; suitability

Current through July 13, 2024
[Statutory Provision]
All electrical connections or splices in conductors shall
					 be mechanically and electrically efficient, and suitable connectors shall be
					 used. All electrical connections or splices in insulated wire shall be
					 reinsulated at least to the same degree of protection as the remainder of the
					 wire.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart F - Electrical Equipment-General › Section 75.515 - Cable fittings; suitability

Current through July 13, 2024
[Statutory Provision]
Cables shall enter metal frames of motors, splice boxes,
					 and electric compartments only through proper fittings. When insulated wires
					 other than cables pass through metal frames, the holes shall be substantially
					 bushed with insulated bushings.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart F - Electrical Equipment-General › Section 75.516 - Power wires; support

Current through July 13, 2024
[Statutory Provision]
All power wires (except trailing cables on mobile
					 equipment, specially designed cables conducting high-voltage power to
					 underground rectifying equipment or transformers, or bare or insulated ground
					 and return wires) shall be supported on well-insulated insulators and shall not
					 contact combustible material, roof, or ribs.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart F - Electrical Equipment-General › Section 75.516-1 - Installed insulators

Current through July 13, 2024
Well-insulated insulators is interpreted to mean
					 well-installed insulators. Insulated J-hooks may be used to suspend insulated
					 power cables for temporary installation not exceeding 6 months and for
					 permanent installation of control cables such as may be used along belt
					 conveyors.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart F - Electrical Equipment-General › Section 75.516-2 - Communication wires and cables; installation; insulation; support

Current through July 13, 2024
(a) All communication wires shall be
				  supported on insulated hangers or insulated J-hooks.
(b) All communication cables shall be
				  insulated as required by S 75.517-1, and shall either be supported on insulated
				  or uninsulated hangers or J-hooks, or securely attached to messenger wires, or
				  buried, or otherwise protected against mechanical damage in a manner approved
				  by the Secretary or his authorized representative.
(c) All communication wires and cables
				  installed in track entries shall, except when a communication cable is buried
				  in accordance with paragraph (b) of this section, be installed on the side of
				  the entry opposite to trolley wires and trolley feeder wires. Additional
				  insulation shall be provided for communication circuits at points where they
				  pass over or under any power conductor.
(d) For purposes of this section,
				  communication cable means two or more insulated conductors covered by an
				  additional abrasion-resistant covering.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart F - Electrical Equipment-General › Section 75.517 - Power wires and cables; insulation and protection

Current through July 13, 2024
[Statutory Provisions]
Power wires and cables, except trolley wires, trolley
					 feeder wires, and bare signal wires, shall be insulated adequately and fully
					 protected.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart F - Electrical Equipment-General › Section 75.517-1 - Power wire and cables; insulation and protection

Current through July 13, 2024
Power wires and cables installed on or after March 30,
					 1970, shall have insulation with a dielectric strength at least equal to the
					 voltage of the circuit.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart F - Electrical Equipment-General › Section 75.517-2 - Plans for insulation of existing bare power wires and cables

Current through July 13, 2024
(a) On or before December 31, 1970, plans for
				  the insulation of existing bare power wires and cables installed prior to March
				  30, 1970, shall be filed with the District Manager of the Coal Mine Safety
				  District in which the mine is located to permit approval and prompt
				  implementation of such plans.
(b)
				  The appropriate District Manager shall notify the operator in writing of the
				  approval of a proposed insulation plan. If revisions are required for approval,
				  the changes required will be specified.
(c) An insulation plan shall include the
				  following information:
(1) Name and address
				  of the company, the mine and the responsible officials;
(2) Map or diagram indicating location of
				  power wires and cables required to be insulated;
(3) Total length of bare power wires and
				  cables required to be insulated;
(4) Schedule for the replacement or
				  insulation of bare power wires and cables;
(5) Type of insulation to be used and the
				  voltage rating as indicated by the manufacturer.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart F - Electrical Equipment-General › Section 75.518 - Electric equipment and circuits; overload and short circuit protection

Current through July 13, 2024
[Statutory Provision]
Automatic circuit-breaking devices or fuses of the correct
					 type and capacity shall be installed so as to protect all electric equipment
					 and circuits against short circuit and overloads. Three-phase motors on all
					 electric equipment shall be provided with overload protection that will
					 deenergize all three phases in the event that any phase is
					 overloaded.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart F - Electrical Equipment-General › Section 75.518-1 - Electric equipment and circuits; overload and short circuit protection; minimum requirements

Current through July 13, 2024
A device to provide either short circuit protection or
					 protection against overload which does not conform to the provisions of the
					 National Electric Code, 1968, does not meet the requirement of S 75.518. In
					 addition, such devices on electric face equipment and trailing cables that are
					 required to be permissible must meet the requirements of the applicable
					 schedules of the Bureau of Mines.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart F - Electrical Equipment-General › Section 75.518-2 - Incandescent lamps, overload and short circuit protection

Current through July 13, 2024
Incandescent lamps installed along haulageways and at other
					 locations, not contacting combustible material, and powered from trolley or
					 direct current feeder circuits, need not be provided with separate short
					 circuit or overload protection, if the lamp is not more than 8 feet in distance
					 from such circuits.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart F - Electrical Equipment-General › Section 75.519 - Main power circuits; disconnecting switches

Current through July 13, 2024
[Statutory Provision]
In all main power circuits, disconnecting switches shall be
					 installed underground within 500 feet of the bottoms of shafts and boreholes
					 through which main power circuits enter the underground area of the mine and
					 within 500 feet of all other places where main power circuits enter the
					 underground area of the mine.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart F - Electrical Equipment-General › Section 75.519-1 - Main power circuits; disconnecting switches; locations

Current through July 13, 2024
Section
					 75.519
					 requires (a) that a disconnecting switch be installed on the surface at a point
					 within 500 feet of the place where the main power circuit enters the
					 underground area of a mine, and (b) that, in an instance on which a main power
					 circuit enters the underground area through a shaft or borehole, a
					 disconnecting switch be installed underground within 500 feet of the bottom of
					 the shaft or borehole.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart F - Electrical Equipment-General › Section 75.520 - Electric equipment; switches

Current through July 13, 2024
[Statutory Provision]
All electric equipment shall be provided with switches or
					 other controls that are safely designed, constructed, and
					 installed.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart F - Electrical Equipment-General › Section 75.521 - Lightning arresters; ungrounded and exposed power conductor and telephone wires

Current through July 13, 2024
Each ungrounded, exposed power conductor and each
					 ungrounded, exposed telephone wire that leads underground shall be equipped
					 with suitable lightning arresters of approved type within 100 feet of the point
					 where the circuit enters the mine. Lightning arresters shall be connected to a
					 low resistance grounding medium on the surface which shall be separated from
					 neutral grounds by a distance of not less than 25 feet.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart F - Electrical Equipment-General › Section 75.522 - Lighting devices

Current through July 13, 2024
[Statutory Provision]
No device for the purpose of lighting any coal mine which
					 has not been approved by the Secretary or his authorized representative shall
					 be permitted in such mine.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart F - Electrical Equipment-General › Section 75.522-1 - Incandescent and fluorescent lamps

Current through July 13, 2024
(a) Except for
				  areas of a coal mine inby the last open crosscut, incandescent lamps may be
				  used to illuminate underground areas. When incandescent lamps are used in a
				  track entry or belt entry or near track entries to illuminate special areas
				  other than structures, the lamps shall be installed in weather-proof sockets
				  located in positions such that the lamps will not come in contact with any
				  combustible material. Lamps used in all other places must be of substantial
				  construction and be fitted with a glass enclosure.
(b) Incandescent lamps within glass
				  enclosures or fluorescent lamps may be used inside underground structures
				  (except magazines used for the storage of explosives and detonators). In
				  underground structures lighting circuits shall consist of cables installed on
				  insulators or insulated wires installed in metallic conduit or metallic
				  armor.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart F - Electrical Equipment-General › Section 75.523 - Electric face equipment; deenergization

Current through July 13, 2024
[Statutory Provision]
An authorized representative of the Secretary may require
					 in any mine that electric face equipment be provided with devices that will
					 permit the equipment to be deenergized quickly in the event of an
					 emergency.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart F - Electrical Equipment-General › Section 75.523-1 - Deenergization of self-propelled electric face equipment installation requirements

Current through July 13, 2024
(a) Except as
				  provided in paragraphs (b) and (c) of this section, all self-propelled electric
				  face equipment which is used in the active workings of each underground coal
				  mine on and after March 1, 1973, shall, in accordance with the schedule of time
				  specified in paragraphs (a)(1) and (2) of this section, be provided with a
				  device that will quickly deenergize the tramming motors of the equipment in the
				  event of an emergency. The requirements of this paragraph (a) shall be met as
				  follows:
(1) On and after December 15, 1974,
				  for self-propelled cutting machines, shuttle cars, battery-powered machines,
				  and roof drills and bolters;
(2) On
				  and after February 15, 1975, for all other types of self-propelled electric
				  face equipment.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart F - Electrical Equipment-General › Section 75.523-2 - Deenergization of self-propelled electric face equipment; performance requirements

Current through July 13, 2024
(a) Deenergization
				  of the tramming motors of self-propelled electric face equipment, required by
				  paragraph (a) of S 75.523-1, shall be provided by:
(1) Mechanical actuation of an existing
				  pushbutton emergency stopswitch,
(2) Mechanical actuation of an existing lever
				  emergency stopswitch, or
(3) The
				  addition of a separate electromechanical switch assembly.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart F - Electrical Equipment-General › Section 75.523-3 - Automatic emergency-parking brakes

Current through July 13, 2024
(a) Except for
				  personnel carriers, rubber-tired, self-propelled electric haulage equipment
				  used in the active workings of underground coal mines shall be equipped with
				  automatic emergency-parking brakes in accordance with the following schedule.
(1) On and after May 23, 1989--
(i) All new equipment ordered; and
(ii) All equipment originally furnished with
				  or retrofitted with automatic emergency-parking brakes which meet the
				  requirements of this section.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart G - Trailing Cables › Section 75.600 - Trailing cables; flame resistance

Current through July 13, 2024
[Statutory Provisions]
Trailing cables used in coal mines shall meet the
					 requirements established by the Secretary for flame-resistant
					 cables.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart G - Trailing Cables › Section 75.601 - Short circuit protection of trailing cables

Current through July 13, 2024
[Statutory Provisions]
Short circuit protection for trailing cables shall be
					 provided by an automatic circuit breaker or other no less effective device
					 approved by the Secretary of adequate current-interrupting capacity in each
					 ungrounded conductor. Disconnecting devices used to disconnect power from
					 trailing cables shall be plainly marked and identified and such devices shall
					 be equipped or designed in such a manner that it can be determined by visual
					 observation that the power is disconnected.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart G - Trailing Cables › Section 75.601-1 - Short circuit protection; rating and setting of circuit breakers

Current through July 13, 2024
Circuit breakers providing short circuit protection for
					 trailing cables shall be set so as not to exceed the maximum allowable
					 instantaneous settings specified in this section; however, higher settings may
					 be permitted by an authorized representative of the Secretary when he has
					 determined that special applications are justified:
Conductor size AWG or MGM
Maximum allowable circuit breaker instantaneous
								setting (amperes)
14
50
12
75
10
150
8
200
6
300
4
500
3
600
2
800
1
1,000
1/0
1,250
2/0
1,500
3/0
2,000
4/0
2,500
250
2,500
300
2,500
350
2,500
400
2,500
450
2,500
500
2,500
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart G - Trailing Cables › Section 75.601-2 - Short circuit protection; use of fuses; approval by the Secretary

Current through July 13, 2024
Fuses shall not be employed to provide short circuit
					 protection for trailing cables unless specifically approved by the
					 Secretary.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart G - Trailing Cables › Section 75.601-3 - Short circuit protection; dual element fuses; current ratings; maximum values

Current through July 13, 2024
Dual element fuses having adequate current-interrupting
					 capacity shall meet the requirements for short circuit protection of trailing
					 cables as provided in S 75.601, however, the current ratings of such devices
					 shall not exceed the maximum values specified in this section:
Conductor size (AWG or MGM)
Single conductor cable Ampacity Max. fuse
								rating
Two conductor cable Ampacity Max. fuse
								rating
14
15
15
12
20
20
10
25
25
8
60
60
50
50
6
85
90
65
70
4
110
110
90
90
3
130
150
105
110
2
150
150
120
125
1
170
175
140
150
1/0
200
200
170
175
2/0
235
250
195
200
3/0
275
300
225
225
4/0
315
350
260
300
250
350
350
285
300
300
395
400
310
350
350
445
450
335
350
400
480
500
360
400
450
515
600
385
400
500
545
600
415
450
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart G - Trailing Cables › Section 75.602 - Trailing cable junctions

Current through July 13, 2024
[Statutory Provision]
When two or more trailing cables junction to the same
					 distribution center, means shall be provided to assure against connecting a
					 trailing cable to the wrong size circuit breaker.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart G - Trailing Cables › Section 75.603 - Temporary splice of trailing cable

Current through July 13, 2024
[Statutory Provision]
One temporary splice may be made in any trailing cable.
					 Such trailing cable may only be used for the next 24-hour period. No temporary
					 splice shall be made in a trailing cable within 25 feet of the machine, except
					 cable reel equipment. Temporary splices in trailing cables shall be made in a
					 workmanlike manner and shall be mechanically strong and well insulated.
					 Trailing cables or hand cables which have exposed wires or which have splices
					 that heat or spark under load shall not be used. As used in this section, the
					 term "splice" means the mechanical joining of one or more conductors that have
					 been severed.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart G - Trailing Cables › Section 75.604 - Permanent splicing of trailing cables

Current through July 13, 2024
[Statutory Provisions]
When permanent splices in trailing cables are made, they
					 shall be--
(a) Mechanically strong with
				  adequate electrical conductivity and flexibility;
(b) Effectively insulated and sealed so as to
				  exclude moisture; and
(c)
				  Vulcanized or otherwise treated with suitable materials to provide
				  flame-resistant qualities and good bonding to the outer jacket.
(d) Made using splice kits accepted or
				  approved by MSHA as flame resistant.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart G - Trailing Cables › Section 75.605 - Clamping of trailing cable to equipment

Current through July 13, 2024
[Statutory Provisions]
Trailing cables shall be clamped to machines in a manner to
					 protect the cables from damage and to prevent strain on the electrical
					 connections.