reglab/statecodes huggingface dataset:
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 5 - SURFACE COAL MINES › Subpart E - Safeguards for Mechanical Equipment › Section 77.409 - Shovels, draglines, and tractors

Current through July 13, 2024
(a) Shovels,
				  draglines, and tractors shall not be operated in the presence of any person
				  exposed to a hazard from its operation and all such equipment shall be provided
				  with an adequate warning device which shall be sounded by the operator prior to
				  starting operation.
(b) Shovels and
				  draglines shall be equipped with handrails along and around all walkways and
				  platforms.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 5 - SURFACE COAL MINES › Subpart E - Safeguards for Mechanical Equipment › Section 77.410 - Mobile equipment; automatic warning devices

Current through July 13, 2024
(a)
				  Mobile equipment such as front-end loaders, forklifts, tractors, graders, and
				  trucks, except pickup trucks with an unobstructed rear view, shall be equipped
				  with a warning device that-
(1) Gives an
				  audible alarm when the equipment is put in reverse; or
(2) Uses infrared light, ultrasonic waves,
				  radar, or other effective devices to detect objects or persons at the rear of
				  the equipment, and sounds an audible alarm when a person or object is detected.
				  This type of discriminating warning device shall-
(i) Have a sensing area of a sufficient size
				  that would allow endangered persons adequate time to get out of the danger
				  zone.
(ii) Give audible and visual
				  alarms inside the operator's compartment and a audible alarm outside of the
				  operator's compartment when a person or object is detected in the sensing area;
				  and
(iii) When the equipment is put
				  in reverse, activate and give a one-time audible and visual alarm inside the
				  operator's compartment and a one-time audible alarm outside the operator's
				  compartment.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 5 - SURFACE COAL MINES › Subpart E - Safeguards for Mechanical Equipment › Section 77.411 - Compressed air and boilers; general

Current through July 13, 2024
All boilers and pressure vessels shall be constructed,
					 installed, and maintained in accordance with the standards and specifications
					 of the American Society of Mechanical Engineers Boiler and Pressure Vessel
					 Code.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 5 - SURFACE COAL MINES › Subpart E - Safeguards for Mechanical Equipment › Section 77.412 - Compressed air systems

Current through July 13, 2024
(a) Compressors and
				  compressed-air receivers shall be equipped with automatic pressure-relief
				  valves, pressure gages, and drain valves.
(b) Repairs involving the pressure system of
				  compressors, receivers, or compressed-air-powered equipment shall not be
				  attempted until the pressure has been relieved from that part of the system to
				  be repaired.
(c) At no time shall
				  compressed air be directed toward a person. When compressed air is used, all
				  necessary precautions shall be taken to protect persons from injury.
(d) Safety chains or suitable locking devices
				  shall be used at connections to machines of high-pressure hose lines of 1-inch
				  inside diameter or larger, and between high-pressure hose lines of 1-inch
				  inside diameter or larger, where a connection failure would create a
				  hazard.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 5 - SURFACE COAL MINES › Subpart E - Safeguards for Mechanical Equipment › Section 77.413 - Boilers

Current through July 13, 2024
(a) Boilers shall be equipped with guarded,
				  well-maintained water gages and pressure gages placed so that they can be
				  observed easily. Water gages and pipe passages to the gages shall be kept clean
				  and free of scale and rust.
(b)
				  Boilers shall be equipped with automatic pressure-relief valves; valves shall
				  be opened manually at least once a week to determine that they will function
				  properly.
(c) Blowoff valves shall
				  be piped outside the building and shall have outlets so located or protected
				  that persons passing by, near, or under them will not be scalded.
(d) Boiler installations shall be provided
				  with safety devices, acceptable to the Mine Safety and Health Administration,
				  to protect against hazards of flameouts, fuel interruptions, and low-water
				  level.
(e) Boilers shall be
				  inspected internally at least once a year by a licensed inspector and a
				  certificate of inspection signed by the inspector shall be displayed in the
				  vicinity of the boiler.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 5 - SURFACE COAL MINES › Subpart F - Electrical Equipment-General › Section 77.500 - Electric power circuits and electric equipment; deenergization

Current through July 13, 2024
Power circuits and electric equipment shall be deenergized
					 before work is done on such circuits and equipment, except when necessary for
					 troubleshooting or testing.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 5 - SURFACE COAL MINES › Subpart F - Electrical Equipment-General › Section 77.501 - Electric distribution circuits and equipment; repair

Current through July 13, 2024
No electrical work shall be performed on electric
					 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 5 - SURFACE COAL MINES › Subpart F - Electrical Equipment-General › Section 77.501-1 - Qualified person

Current through July 13, 2024
A qualified person within the meaning of S 77.501 is an
					 individual who meets the requirements of S 77.103.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 5 - SURFACE COAL MINES › Subpart F - Electrical Equipment-General › Section 77.502 - Electric equipment; examination, testing, and maintenance

Current through July 13, 2024
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.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 5 - SURFACE COAL MINES › Subpart F - Electrical Equipment-General › Section 77.502-1 - Qualified person

Current through July 13, 2024
A qualified person within the meaning of S 77.502 is an
					 individual who meets the requirements of S 77.103.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 5 - SURFACE COAL MINES › Subpart F - Electrical Equipment-General › Section 77.502-2 - Electric equipment; frequency of examination and testing

Current through July 13, 2024
The examinations and tests required under the provision of
					 this S 77.502 shall be conducted at least monthly.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 5 - SURFACE COAL MINES › Subpart F - Electrical Equipment-General › Section 77.503 - Electric conductors; capacity and insulation

Current through July 13, 2024
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 5 - SURFACE COAL MINES › Subpart F - Electrical Equipment-General › Section 77.503-1 - Electric conductors

Current through July 13, 2024
Electric conductors shall be sufficient in size to meet the
					 minimum current carrying capacity provided for in the National Electric Code,
					 1968. All trailing cables shall meet the minimum requirements for ampacity
					 provided in the standards of the Insulated Power Cable Engineers
					 Association-National Electric Manufacturers Association in effect when such
					 cables are purchased.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 5 - SURFACE COAL MINES › Subpart F - Electrical Equipment-General › Section 77.504 - Electrical connections or splices; suitability

Current through July 13, 2024
Electrical connections or splices in electric 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 5 - SURFACE COAL MINES › Subpart F - Electrical Equipment-General › Section 77.505 - Cable fittings; suitability

Current through July 13, 2024
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 5 - SURFACE COAL MINES › Subpart F - Electrical Equipment-General › Section 77.506 - Electric equipment and circuits; overload and short-circuit protection

Current through July 13, 2024
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.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 5 - SURFACE COAL MINES › Subpart F - Electrical Equipment-General › Section 77.506-1 - Electric equipment and circuits; overload and short circuit protection; minimum requirements

Current through July 13, 2024
Devices providing either short circuit protection or
					 protection against overload shall conform to the minimum requirements for
					 protection of electric circuits and equipment of the National Electric Code,
					 1968.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 5 - SURFACE COAL MINES › Subpart F - Electrical Equipment-General › Section 77.508 - Lightning arresters, ungrounded and exposed power conductors and telephone wires

Current through July 13, 2024
All ungrounded, exposed power conductors and telephone
					 wires shall be equipped with suitable lightning arresters which are adequately
					 installed and connected to a low resistance grounding medium.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 5 - SURFACE COAL MINES › Subpart F - Electrical Equipment-General › Section 77.508-1 - Lightning arresters; wires entering buildings

Current through July 13, 2024
Lightning arresters protecting exposed telephone wires
					 entering buildings shall be provided at the point where each such telephone
					 wire enters the building.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 5 - SURFACE COAL MINES › Subpart F - Electrical Equipment-General › Section 77.509 - Transformers; installation and guarding

Current through July 13, 2024
(a) Transformers
				  shall be of the totally enclosed type, or shall be placed at least 8 feet above
				  the ground, or installed in a transformer house, or surrounded by a substantial
				  fence at least 6 feet high and at least 3 feet from any energized parts,
				  casings, or wiring.
(b) Transformer
				  stations shall be enclosed to prevent persons from unintentionally or
				  inadvertently contacting energized parts.
(c) Transformer enclosures shall be kept
				  locked against unauthorized entry.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 5 - SURFACE COAL MINES › Subpart F - Electrical Equipment-General › Section 77.510 - Resistors; location and guarding

Current through July 13, 2024
Resistors, heaters, and rheostats shall be located so as to
					 minimize fire hazards and, where necessary, provided with guards to prevent
					 personal contact.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 5 - SURFACE COAL MINES › Subpart F - Electrical Equipment-General › Section 77.512 - Inspection and cover plates

Current through July 13, 2024
Inspection and cover plates on electrical equipment shall
					 be kept in place at all times except during testing or
					 repairs.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 5 - SURFACE COAL MINES › Subpart F - Electrical Equipment-General › Section 77.513 - Insulating mats at power switches

Current through July 13, 2024
Dry wooden platforms, insulating mats, or other
					 electrically nonconductive material shall be kept in place at all switchboards
					 and power-control switches where shock hazards exist. However, metal plates on
					 which a person normally would stand and which are kept at the same potential as
					 the grounded, metal, non-current-carrying parts of the power switches to be
					 operated may be used.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 5 - SURFACE COAL MINES › Subpart F - Electrical Equipment-General › Section 77.514 - Switchboards; passageways and clearance

Current through July 13, 2024
Switchboards shall be installed to provide passageways or
					 lanes of travel which permit access to the back of the switchboard from both
					 ends for inspection, adjustment or repair. Openings permitting access to the
					 rear of any switchboard shall be guarded, except where they are located in
					 buildings which are kept locked.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 5 - SURFACE COAL MINES › Subpart F - Electrical Equipment-General › Section 77.515 - Bare signal or control wires; voltage

Current through July 13, 2024
The voltage on bare signal or control wires accessible to
					 personal contact shall not exceed 40 volts.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 5 - SURFACE COAL MINES › Subpart F - Electrical Equipment-General › Section 77.516 - Electric wiring and equipment; installation and maintenance

Current through July 13, 2024
In addition to the requirements of SS 77.503 and 77.506,
					 all wiring and electrical equipment installed after June 30, 1971, shall meet
					 the requirements of the National Electric Code in effect at the time of
					 installation.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 5 - SURFACE COAL MINES › Subpart G - Trailing Cables › Section 77.600 - Trailing cables; short-circuit protection; disconnecting devices

Current through July 13, 2024
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 5 - SURFACE COAL MINES › Subpart G - Trailing Cables › Section 77.601 - Trailing cables or portable cables; temporary splices

Current through July 13, 2024
Temporary splices in trailing cables or portable cables
					 shall be made in a workmanlike manner and shall be mechanically strong and well
					 insulated. Trailing cables or portable cables with exposed wires or splices
					 that heat or spark under load shall not be used.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 5 - SURFACE COAL MINES › Subpart G - Trailing Cables › Section 77.602 - Permanent splicing of trailing cables

Current through July 13, 2024
When permanent splices in trailing cables are made, they
					 shall be:
(a) Mechanically strong with
				  adequate electrical conductivity;
(b) Effectively insulated and sealed so as to
				  exclude moisture; and,
(c)
				  Vulcanized or otherwise made with suitable materials to provide good bonding to
				  the outer jacket.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 5 - SURFACE COAL MINES › Subpart G - Trailing Cables › Section 77.603 - Clamping of trailing cables to equipment

Current through July 13, 2024
Trailing cables shall be clamped to machines in a manner to
					 protect the cables from damage and to prevent strain on the electrical
					 connections.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 5 - SURFACE COAL MINES › Subpart G - Trailing Cables › Section 77.606 - Energized trailing cables; handling

Current through July 13, 2024
Energized medium- and high-voltage trailing cables shall be
					 handled only by persons wearing protective rubber gloves (see S77.606-1) and,
					 with such other protective devices as may be necessary and appropriate under
					 the circumstances.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 5 - SURFACE COAL MINES › Subpart G - Trailing Cables › Section 77.606-1 - Rubber gloves; minimum requirements

Current through July 13, 2024
(a) Rubber
				  gloves (lineman's gloves) worn while handling high-voltage trailing cables
				  shall be rated at least 20,000 volts and shall be used and tested in accordance
				  with the provisions of SS 77.704-6 through 77.704-8.
(b) Rubber gloves (wireman's gloves) worn
				  while handling trailing cables energized by 660 to 1,000 volts shall be rated
				  at least 1,000 volts and shall not be worn inside out or without protective
				  leather gloves.
(c) Rubber gloves
				  shall be inspected for defects before use on each shift and at least once
				  thereafter during the shift when such rubber gloves are used for extended
				  periods. All protective rubber gloves which contain defects shall be discarded
				  and replaced prior to handling energized cables.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 5 - SURFACE COAL MINES › Subpart H - Grounding › Section 77.700 - Grounding metallic sheaths, armors, and conduits enclosing power conductors

Current through July 13, 2024
Metallic sheaths, armors, and conduits enclosing power
					 conductors shall be electrically continuous throughout and shall be grounded by
					 methods approved by an authorized representative of the
					 Secretary.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 5 - SURFACE COAL MINES › Subpart H - Grounding › Section 77.700-1 - Approved methods of grounding

Current through July 13, 2024
Metallic sheaths, armors, and conduits in resistance
					 grounded systems, where the enclosed conductors are a part of the system, will
					 be approved if a solid connection is made to the neutral conductor; in all
					 other systems, the following methods of grounding will be approved:
(a) A solid connection to metal waterlines
				  having low resistance to earth;
(b)
				  A solid connection to a grounding conductor, other than the neutral conductor
				  of a resistance grounded system, extending to a low-resistance ground
				  field;
(c) Any other method of
				  grounding, approved by an authorized representative of the Secretary, which
				  ensures that there is no difference in potential between such metallic
				  enclosures and the earth.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 5 - SURFACE COAL MINES › Subpart H - Grounding › Section 77.701 - Grounding metallic frames, casings, and other enclosures of electric equipment

Current through July 13, 2024
Metallic frames, casings, and other enclosures of electric
					 equipment that can become "alive" through failure of insulation or by contact
					 with energized parts shall be grounded by methods approved by an authorized
					 representative of the Secretary.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 5 - SURFACE COAL MINES › Subpart H - Grounding › Section 77.701-1 - Approved methods of grounding of equipment receiving power from ungrounded alternating current power systems

Current through July 13, 2024
For purposes of grounding metallic frames, casings and
					 other enclosures of equipment receiving power from ungrounded alternating
					 current power systems, the following methods of grounding will be
					 approved:
(a) A solid connection
				  between the metallic frame; casing, or other metal enclosure and the grounded
				  metallic sheath, armor, or conduit enclosing the power conductor feeding the
				  electric equipment enclosed;
(b) A
				  solid connection to metal waterlines having low resistance to earth;
(c) A solid connection to a grounding
				  conductor extending to a low-resistance ground field; and,
(d) Any other method of grounding, approved
				  by an authorized representative of the Secretary, which insures that there is
				  no difference in potential between such metal enclosures and the
				  earth.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 5 - SURFACE COAL MINES › Subpart H - Grounding › Section 77.701-2 - Approved methods of grounding metallic frames, casings, and other enclosures of electric equipment receiving power from a direct-current power system

Current through July 13, 2024
(a) The following methods of grounding
				  metallic frames, casings, and other enclosures of electric equipment receiving
				  power from a direct-current power system with one polarity grounded will be
				  approved:
(1) A solid connection to the
				  grounded power conductor of the system; and,
(2) Any other method, approved by an
				  authorized representative of the Secretary, which insures that there is no
				  difference in potential between such metal enclosures and the earth.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 5 - SURFACE COAL MINES › Subpart H - Grounding › Section 77.701-3 - Grounding wires; capacity

Current through July 13, 2024
Where grounding wires are used to ground metallic sheaths,
					 armors, conduits, frames, casings, and other metallic enclosures, such
					 grounding wires will be approved if:
(a) Where the power conductor used is No. 6
				  A.W.G., or larger, the cross-sectional area of the grounding wire is at least
				  one-half the cross-sectional area of the power conductor.
(b) Where the power conductor used is less
				  than No. 6 A.W.G., the cross-sectional area of the grounding wire is equal to
				  the cross-sectional area of the power conductor.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 5 - SURFACE COAL MINES › Subpart H - Grounding › Section 77.701-4 - Use of grounding connectors

Current through July 13, 2024
If ground wires are attached to grounded power conductors,
					 separate clamps, suitable for such purpose, shall be used and installed to
					 provide a solid connection.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 5 - SURFACE COAL MINES › Subpart H - Grounding › Section 77.702 - Protection other than grounding

Current through July 13, 2024
Methods other than grounding which provide no less
					 effective protection may be permitted by the Secretary or his authorized
					 representative. Such methods may not be used unless so
					 approved.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 5 - SURFACE COAL MINES › Subpart H - Grounding › Section 77.703 - Grounding frames of stationary high-voltage equipment receiving power from ungrounded delta systems

Current through July 13, 2024
The frames of all stationary high-voltage equipment
					 receiving power from ungrounded delta systems shall be grounded by methods
					 approved by an authorized representative of the Secretary.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 5 - SURFACE COAL MINES › Subpart H - Grounding › Section 77.703-1 - Approved methods of grounding

Current through July 13, 2024
The methods of grounding stated in S 77.701-1 will be
					 approved with respect to the grounding of frames of high-voltage equipment
					 referred to in S 77.703.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 5 - SURFACE COAL MINES › Subpart H - Grounding › Section 77.704 - Work on high-voltage lines; deenergizing and grounding

Current through July 13, 2024
High-voltage lines shall be deenergized and grounded before
					 work is performed on them, except that repairs may be permitted on energized
					 high-voltage lines if (a) such repairs are made by a qualified person in
					 accordance with procedures and safeguards set forth in SS 77.704-1 through
					 77.704-11 of this Subpart H as applicable, and (b) the operator has tested and
					 properly maintained the protective devices necessary in making such
					 repairs.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 5 - SURFACE COAL MINES › Subpart H - Grounding › Section 77.704-1 - Work on high-voltage lines

Current through July 13, 2024
(a) No high-voltage
				  line shall be regarded as deenergized for the purpose of performing work on it,
				  until it has been determined by a qualified person (as provided in S 77.103)
				  that such high-voltage line has been deenergized and grounded. Such qualified
				  person shall by visual observation (1) determine that the disconnecting devices
				  on the high-voltage circuit are in open position, and (2) insure that each
				  ungrounded conductor of the high-voltage circuit upon which work is to be done
				  is properly connected to the system grounding medium. In the case of resistance
				  grounded or solid wye-connected systems, the neutral wire is the system
				  grounding medium. In the case of an ungrounded power system, either the steel
				  armor or conduit enclosing the system or a surface grounding field is a system
				  grounding medium;
(b) No work shall
				  be performed on any high-voltage line which is supported by any pole or
				  structure which also supports other high-voltage lines until:
(1) All lines supported on the pole or
				  structure are deenergized and grounded in accordance with all of the provisions
				  of this S 77.704-1 which apply to the repair of deenergized surface
				  high-voltage lines; or
(2) the
				  provisions of SS 77.704-2 through 77.704-10 have been complied with, with
				  respect to all energized lines, which are supported on the pole or
				  structure.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 5 - SURFACE COAL MINES › Subpart H - Grounding › Section 77.704-2 - Repairs to energized high-voltage lines

Current through July 13, 2024
An energized high-voltage line may be repaired only
					 when:
(a) The operator has determined
				  that,
(1) Such repairs cannot be scheduled
				  during a period when the power circuit could be properly deenergized and
				  grounded;
(2) Such repairs will be
				  performed on power circuits with a phase-to-phase nominal voltage no greater
				  than 15,000 volts;
(3) Such repairs
				  on circuits with a phase-to-phase nominal voltage of 5,000 volts or more will
				  be performed only with the use of live line tools; and,
(4) Weather conditions will not interfere
				  with such repairs or expose those persons assigned to such work to an imminent
				  danger; and,
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 5 - SURFACE COAL MINES › Subpart H - Grounding › Section 77.704-3 - Work on energized high-voltage surface lines; reporting

Current through July 13, 2024
Any operator designating and assigning qualified persons to
					 perform repairs on energized high-voltage surface lines under the provisions of
					 S 77.704-2 shall maintain a record of such repairs. Such record shall contain a
					 notation of the time, date, location, and general nature of the repairs made
					 together with a copy of the information filed with the operator by the
					 qualified person designated as responsible for performing such
					 repairs.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 5 - SURFACE COAL MINES › Subpart H - Grounding › Section 77.704-4 - Simultaneous repairs

Current through July 13, 2024
When two or more persons are working on an energized
					 high-voltage surface line simultaneously, and any one of them is within reach
					 of another, such persons shall not be allowed to work on different phases or on
					 equipment with different potentials.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 5 - SURFACE COAL MINES › Subpart H - Grounding › Section 77.704-5 - Installation of protective equipment

Current through July 13, 2024
Before repair work on energized high-voltage surface lines
					 is begun, protective equipment shall be used to cover all bare conductors,
					 ground wires, guys, telephone lines, and other attachments in proximity to the
					 area of planned repairs. Such protective equipment shall be installed from a
					 safe position below the conductors or other apparatus being covered. Each
					 rubber protective device employed in the making of repairs shall have a
					 dielectric strength of 20,000 volts, or more.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 5 - SURFACE COAL MINES › Subpart H - Grounding › Section 77.704-6 - Protective clothing; use and inspection

Current through July 13, 2024
All persons performing work on energized high-voltage
					 surface lines shall wear protective rubber lineman's gloves, sleeves, and
					 climber guards if climbers are worn. Protective rubber gloves shall not be worn
					 wrong side out or without protective leather gloves. Protective devices worn by
					 a person assigned to perform repairs on high-voltage surface lines shall be
					 worn continuously from the time he leaves the ground until he returns to the
					 ground and, if such devices are employed for extended periods, such person
					 shall visually inspect the equipment assigned him for defects before each use
					 and, in no case, less than twice each day.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 5 - SURFACE COAL MINES › Subpart H - Grounding › Section 77.704-7 - Protective equipment; inspection

Current through July 13, 2024
Each person shall visually inspect protective equipment and
					 clothing provided him in connection with work on high-voltage surface lines
					 before using such equipment and clothing, and any equipment or clothing
					 containing any defect or damage shall be discarded and replaced with proper
					 protective equipment or clothing prior to the performance of any electrical
					 work on such lines.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 5 - SURFACE COAL MINES › Subpart H - Grounding › Section 77.704-8 - Protective equipment; testing and storage

Current through July 13, 2024
(a) All rubber
				  protective equipment used on work on energized high-voltage surface lines shall
				  be electrically tested by the operator in accordance with ASTM standards, Part
				  28, published February 1968, and such testing shall be conducted in accordance
				  with the following schedule:
(1) Rubber
				  gloves, once each month;
(2) Rubber
				  sleeves, once every 3 months;
(3)
				  Rubber blankets, once every 6 months;
(4) Insulator hoods and line hose, once a
				  year; and
(5) Other electric
				  protective equipment, once a year.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 5 - SURFACE COAL MINES › Subpart H - Grounding › Section 77.704-9 - Operating disconnecting or cutout switches

Current through July 13, 2024
Disconnecting or cutout switches on energized high-voltage
					 surface lines shall be operated only with insulated sticks, fuse tongs, or
					 pullers which are adequately insulated and maintained to protect the operator
					 from the voltage to which he is exposed. When such switches are operated from
					 the ground, the person using such devices shall wear protective rubber
					 lineman's gloves, except where such switches are bonded to a metal mat as
					 provided in S 77.513.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 5 - SURFACE COAL MINES › Subpart H - Grounding › Section 77.704-10 - Tying into energized high-voltage surface circuits

Current through July 13, 2024
If the work of forming an additional circuit by tying into
					 an energized high-voltage surface line is performed from the ground, any person
					 performing such work must wear and employ all of the protective equipment and
					 clothing required under the provisions of SS 77.704-5 and 77.704-6. In
					 addition, the insulated stick used by such person must have been designed for
					 such purpose and must be adequately insulated and be maintained to protect such
					 person from the voltage to which he is exposed.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 5 - SURFACE COAL MINES › Subpart H - Grounding › Section 77.704-11 - Use of grounded messenger wires; ungrounded systems

Current through July 13, 2024
Solely for purposes of grounding ungrounded high-voltage
					 power systems, grounded messenger wires used to suspend the cables of such
					 systems may be used as a grounding medium.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 5 - SURFACE COAL MINES › Subpart H - Grounding › Section 77.705 - Guy wires; grounding

Current through July 13, 2024
Guy wires from poles supporting high-voltage transmission
					 lines shall be securely connected to the system ground or be provided with
					 insulators installed near the pole end.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 5 - SURFACE COAL MINES › Subpart I - Surface High-Voltage Distribution › Section 77.800 - High-voltage circuits; circuit breakers

Current through July 13, 2024
High-voltage circuits supplying power to portable or mobile
					 equipment shall be protected by suitable circuit breakers of adequate
					 interrupting capacity which are properly tested and maintained and equipped
					 with devices to provide protection against under voltage, grounded phase, short
					 circuit and overcurrent. High-voltage circuits supplying power to stationary
					 equipment shall be protected against overloads by either a circuit breaker or
					 fuses of the correct type and capacity.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 5 - SURFACE COAL MINES › Subpart I - Surface High-Voltage Distribution › Section 77.800-1 - Testing, examination, and maintenance of circuit breakers; procedures

Current through July 13, 2024
(a) Circuit breakers and their auxiliary
				  devices protecting high-voltage circuits to portable or mobile equipment shall
				  be tested and examined at least once each month by a person qualified as
				  provided in S 77.103.
(b) Tests
				  shall include:
(1) Breaking continuity of the
				  ground check conductor where ground check monitoring is used; and,
(2) Actuating any of the auxiliary protective
				  relays.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 5 - SURFACE COAL MINES › Subpart I - Surface High-Voltage Distribution › Section 77.800-2 - Testing, examination, and maintenance of circuit breakers; record

Current through July 13, 2024
The operator shall maintain a written record of each test,
					 examination, repair, or adjustment of all circuit breakers protecting
					 high-voltage circuits. Such record shall be kept in a book approved by the
					 Secretary.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 5 - SURFACE COAL MINES › Subpart I - Surface High-Voltage Distribution › Section 77.801 - Grounding resistors

Current through July 13, 2024
The grounding resistor, where required, shall be of the
					 proper ohmic value to limit the voltage drop in the grounding circuit external
					 to the resistor to not more than 100 volts under fault conditions. The
					 grounding resistor shall be rated for maximum fault current continuously and
					 insulated from ground for a voltage equal to the phase-to-phase voltage of the
					 system.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 5 - SURFACE COAL MINES › Subpart I - Surface High-Voltage Distribution › Section 77.801-1 - Grounding resistors; continuous current rating

Current through July 13, 2024
The ground fault current rating of grounding resistors
					 shall meet the "extended time rating" set forth in American Institute of
					 Electrical Engineers, Standard No. 32.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 5 - SURFACE COAL MINES › Subpart I - Surface High-Voltage Distribution › Section 77.802 - Protection of high-voltage circuits; neutral grounding resistors; disconnecting devices

Current through July 13, 2024
High-voltage circuits supplying portable or mobile
					 equipment shall contain either a direct or derived neutral which shall be
					 grounded through a suitable resistor at the source transformers, and a
					 grounding circuit, originating at the grounded side of the grounding resistor,
					 shall extend along with the power conductors and serve as a grounding conductor
					 for the frames of all high-voltage equipment supplied power from that circuit,
					 except that the Secretary or his authorized representative may permit other
					 high-voltage circuits to feed stationary electrical equipment, if he finds that
					 such exception will not pose a hazard to the miners. Disconnecting devices
					 shall be installed and so 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 5 - SURFACE COAL MINES › Subpart I - Surface High-Voltage Distribution › Section 77.803 - Fail safe ground check circuits on high-voltage resistance grounded systems

Current through July 13, 2024
On and after September 30, 1971, all high-voltage,
					 resistance grounded systems shall include a fail safe ground check circuit or
					 other no less effective device approved by the Secretary to monitor
					 continuously the grounding circuit to assure continuity. The fail safe ground
					 check circuit shall cause the circuit breaker to open when either the ground or
					 ground check wire is broken.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 5 - SURFACE COAL MINES › Subpart I - Surface High-Voltage Distribution › Section 77.803-1 - Fail safe ground check circuits; maximum voltage

Current through July 13, 2024
The maximum voltage used for ground check circuits under
					 S77.803 shall not exceed 96 volts.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 5 - SURFACE COAL MINES › Subpart I - Surface High-Voltage Distribution › Section 77.803-2 - Ground check systems not employing pilot check wires; approval by the Secretary

Current through July 13, 2024
Ground check systems not employing pilot check wires shall
					 be approved by the Secretary only if it is determined that the system includes
					 a fail safe design which will cause the circuit interrupter to open when ground
					 continuity is broken.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 5 - SURFACE COAL MINES › Subpart I - Surface High-Voltage Distribution › Section 77.804 - High-voltage trailing cables; minimum design requirements

Current through July 13, 2024
(a) High-voltage trailing cables used in
				  resistance grounded systems shall be equipped with metallic shields around each
				  power conductor with one or more ground conductors having a total
				  cross-sectional area of not less than one-half the power conductor, and with an
				  insulated conductor for the ground continuity check circuit. External ground
				  check conductors may be used if they are not smaller than No. 8 (AWG) and have
				  an insulation rated at least 600 volts.
(b) All such high-voltage trailing cables
				  shall be adequate for the intended current and voltage. Splices made in such
				  cables shall provide continuity of all components.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 5 - SURFACE COAL MINES › Subpart I - Surface High-Voltage Distribution › Section 77.805 - Cable couplers and connection boxes; minimum design requirements

Current through July 13, 2024
(a)
(1)
				  Couplers that are used in medium- or high-voltage power circuits shall be of
				  the three-phase type and enclosed in a full metallic shell, except that the
				  Secretary may permit, under such guidelines as he may prescribe, no less
				  effective couplers constructed of materials other than metal.
(2) Cable couplers shall be adequate for the
				  intended current and voltage.
(3)
				  Cable couplers with any metal exposed shall be grounded to the ground conductor
				  in the cable.
(4) Couplers shall be
				  constructed to cause the ground check continuity conductor to break first and
				  the ground conductor last when being uncoupled when pilot check circuits are
				  used.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 5 - SURFACE COAL MINES › Subpart I - Surface High-Voltage Distribution › Section 77.806 - Connection of single-phase loads

Current through July 13, 2024
Single-phase loads, such as transformer primaries, shall be
					 connected phase to phase in resistance grounded systems.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 5 - SURFACE COAL MINES › Subpart I - Surface High-Voltage Distribution › Section 77.807 - Installation of high-voltage transmission cables

Current through July 13, 2024
High-voltage transmission cables shall be installed or
					 placed so as to afford protection against damage. They shall be placed to
					 prevent contact with low-voltage or communication circuits.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 5 - SURFACE COAL MINES › Subpart I - Surface High-Voltage Distribution › Section 77.807-1 - High-voltage powerlines; clearances above ground

Current through July 13, 2024
High-voltage powerlines located above driveways,
					 haulageways, and railroad tracks shall be installed to provide the minimum
					 vertical clearance specified in National Electrical Safety Code: Provided,
					 however, That in no event shall any high-voltage powerline be installed less
					 than 15 feet above ground.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 5 - SURFACE COAL MINES › Subpart I - Surface High-Voltage Distribution › Section 77.807-2 - Booms and masts; minimum distance from high-voltage lines

Current through July 13, 2024
The booms and masts of equipment operated on the surface of
					 any coal mine shall not be operated within 10 feet of an energized overhead
					 powerline. Where the voltage of overhead powerlines is 69,000 volts, or more,
					 the minimum distance from the boom or mast shall be as follows:
Nominal power line voltage (in 1,000 volts)
Minimum distance (feet)
69 to 114
12
115 to 229
15
230 to 344
20
345 to 499
25
500 or more
35
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 5 - SURFACE COAL MINES › Subpart I - Surface High-Voltage Distribution › Section 77.807-3 - Movement of equipment; minimum distance from high-voltage lines

Current through July 13, 2024
When any part of any equipment operated on the surface of
					 any coal mine is required to pass under or by any energized high-voltage
					 powerline and the clearance between such equipment and powerline is less than
					 that specified in S 77.807-2 for booms and masts, such powerlines shall be
					 deenergized or other precautions shall be taken.