Kentucky Administrative Regulations › Title 805 - ENERGY AND ENVIRONMENT CABINET › Chapter 3 - Mining Safety Standards › Section 805 KAR 3:090 - Electricity

Current through Register Vol. 51, No. 1, July 1, 2024
RELATES TO: KRS 351.070
NECESSITY, FUNCTION, AND CONFORMITY: This administrative
				regulation is to establish safety standards in the use of electricity in the
				operation of the Commonwealth's surface type coal and clay mines which include
				strip and auger mining operations.
Section
			 1. Electricity.
(1) Circuits
			 shall be protected against excessive overloads by fuses or circuit breakers of
			 the correct type and capacity.
(2)
			 Powerlines and telephones circuits shall be protected against short circuits
			 and lightning.
(3) Electric
			 equipment and circuits shall be provided with switches or other controls. Such
			 switches or controls shall be of approved design and construction and shall be
			 properly installed.
(4) Individual
			 overload protection or short-circuit protection shall be provided for the
			 trailing cables of mobile equipment.
(5) Power wires and cables shall have
			 adequate current-carrying capacity and shall be protected from mechanical
			 injury.
(6) Neither crawler-mounted
			 nor rubber-tired equipment shall run over trailing cables, unless the cables
			 are properly bridged or otherwise protected.
(7) Distribution boxes shall be provided with
			 disconnect switches.
(8) Trailing
			 cable and power cable connections to junction boxes shall not be made or broken
			 under load.
(9) Power wires and
			 cables shall be insulated adequately where they pass into or out of electrical
			 compartments.
(10) Power wires and
			 cables which present a fire hazard shall be well installed on acceptable
			 insulators.
(11) Where metallic
			 tools or equipment can come in contact with bare powerlines, the lines shall be
			 guarded or deenergized.
(12)
			 Telephone and low-potential electric signal wires shall be protected from
			 contacting energized powerlines.
(13) High-potential transmission cables shall
			 be covered, insulated, or placed according to acceptable electrical codes to
			 prevent contact with low-potential circuits.
(14) The potential or bare signal wires
			 accessible to personal contact should not exceed forty (40) volts.
(15) Splices in power cables, including
			 ground conductor, where provided, shall be:
(a) Mechanically strong with adequate
			 electrical conductivity;
(b)
			 Effectively insulated and sealed to exclude moisture;
(c) Provided with mechanical protection and
			 electrical conductivity as near as possible to that of the original.
(16) Shovel trailing cables shall
			 not be moved with the shovel dipper unless cable slings or sleds are
			 used.
(17) Energized high-potential
			 cables shall be handled with insulated hooks or tongs.
(18) Electrical equipment shall be
			 deenergized before work is done on such equipment. Switches shall be locked out
			 and suitable warning signs posted by the individuals who are to do the work;
			 locks shall be removed only by authorized persons.
(19) Power circuits shall be deenergized
			 before work is done on such circuits unless hot line tools are used. Switches
			 shall be locked out and suitable warning signs posted by the individuals who
			 are to do the work; locks shall be removed only by authorized
			 persons.
(20) Principal power
			 switches shall be labeled to show which units they control, unless
			 identification can be made readily by location.
(21) At least three (3) feet of clearance
			 shall be provided around all parts of stationary electric equipment or
			 switch-gear where access or travel is necessary.
(22) Dry wooden platforms, insulating mats,
			 or other electrically nonconductive materials shall be kept in place of all
			 switchboards and power-control switches where shock hazards exist. However,
			 metal plates on which a person normally would stand kept at the same potential
			 as the grounded metal noncurrent carrying parts of the power switches to be
			 operated may be used.
(23) Suitable
			 danger signs shall be posted at all major electrical installations.
(24) Areas containing major electrical
			 installations shall be entered only by authorized personnel.
(25) Electrical connections and resistor
			 grids that are difficult or impractical to insulate shall be guarded, unless
			 protection is provided by location.
(26) Reverse-current protection shall be
			 provided at storage battery-charging stations.
(27) All metal enclosing or encasing
			 electrical circuits shall be grounded or provided with equivalent protection.
			 (This requirement does not apply to battery-operated equipment.)
(28) Metal fencing and metal buildings
			 enclosing transformers and switch-gear shall be grounded.
(29) Frame grounding or equivalent protection
			 shall be provided for mobile equipment powered through trailing
			 cables.
(30) Continuity and
			 resistance of grounding systems shall be tested immediately after
			 installation.
(31) Electric
			 equipment and wiring shall be inspected by a competent person as often as
			 necessary to assure safe operating conditions.
(32) When a potentially dangerous condition
			 is found, it shall be corrected before equipment or wiring is
			 energized.
(33) Inspection and
			 cover plates on electrical equipment shall be kept in place at all times except
			 during testing or repairs.
(34)
			 Circuits shall be deenergized before fuses are removed or replaced.
(35) Fuse tongs or hot line tools shall be
			 used when fuses are removed or replaced in medium or high voltage
			 circuits.
(36) Trailing cables
			 shall be clamped to machines in a manner to protect the cables from damage and
			 to prevent strain on the electrical connections.
(37) Surplus trailing cables to shovels,
			 cranes, and similar equipment shall be stored in cable boots or on reels
			 mounted on the equipment or otherwise protected from mechanical
			 damage.
(38) Operating controls
			 shall be installed so that they can be operated without danger of contact with
			 energized conductors.
(39)
			 Equipment with booms or masts which are not properly protected shall not be
			 operated where the booms or masts can come within ten (10) feet of an energized
			 overhead powerline.
(40) Overhead
			 high-potential powerlines shall be installed as specified by the National
			 Electrical Safety Code.
(41) When
			 equipment must be moved under energized power lines and the clearance is less
			 than ten (10) feet, the power lines shall be deenergized or other precautions
			 shall be taken.
(42) 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.
(43) Telegraph, telephone, or
			 signal wires shall not be installed on the same crossarm with power conductors.
			 When carried on poles supporting power lines, they shall be installed as
			 specified by the National Electrical Safety Code.
(44) Transformers shall be totally enclosed,
			 or shall be placed at least fifteen (15) feet above the ground, or installed in
			 a transformer house, or surrounded by a substantial fence at least six (6) feet
			 high and at least three (3) feet from any energized parts, casings, or
			 wiring.
(45) Transformer enclosures
			 shall be kept locked against unauthorized entry.
(46) Tools and supplies shall be carried in
			 the hands and not on the shoulders when men travel near bare power
			 conductors.