(a) All junction or distribution boxes, handheld or moveable equipment and all face machinery used inby the last open crosscut shall be permissible and shall have affixed to it the permissible plate issued by the Bureau of Mines. The operator shall maintain the equipment in a permissible condition.

1. (1) The operator shall have on record at the mine site a weekly inspection record of low and medium voltage equipment. All high voltage equipment and switch gear shall be inspected and recorded in an approved record book monthly.
2. (2) All power circuits and electrical equipment shall be de-energized before working on circuits or equipment except when necessary for trouble shooting or testing.

(l) The following shall apply to trailing cables:

1. (1) Trailing cables shall be flame resistant.
2. (2) Distribution centers supplying current to more than one (1) trailing cable shall be protected against connecting the wrong cable by chaining and marking.
3. (3) Only one (1) temporary splice may be made in any trailing cable-such trailing cable may only be used for the next twenty-four (24) hour period. No temporary splice shall be made in a trailing cable within twenty-five (25) feet of the face machine, except cable reel equipment. All splices shall be mechanically strong and well insulated.
4. (4) Permanent splices shall be mechanically strong, insulated and sealed to exclude moisture, vulcanized or treated to provide flame resistant qualities and good bonding to the outer jacket.
5. (5) Trailing cables shall be clamped to machines in a manner to protect strain on the electrical connections.
6. (6) Trailing cables shall be adequately protected to prevent damage by mobile equipment.
7. (7) Trailing cables shall be adequately grounded.