(a) Equipment subject to seven-day inspection schedule.--At least once every seven days, a MSHA-qualified individual shall test and examine each unit of high-voltage longwall equipment and circuits to determine that electrical protection, equipment grounding, permissibility cable insulation and control devices are being properly maintained to prevent fire, electrical shock, ignition or operational hazards from existing on the equipment. Tests shall include activating the ground-fault test circuit.

(b) Equipment subject to 30-day inspection schedule.--Each ground-wire monitor and associated circuits shall be examined and tested at least once every 30 days to verify proper operation and to verify that it will cause the corresponding circuit-interrupting device to open.

(c) Removal or repair of equipment.--When examinations or tests of equipment reveal a fire, electrical shock, ignition or operational hazard, the equipment must be removed from service immediately or repaired immediately.

(d) Certifications and records.--At the completion of examinations and tests required by this section, the individual who makes the examinations and tests shall certify by signature and date that they have been conducted. A record shall be made of any unsafe condition found and any corrective action taken. Certifications and records shall be kept for at least one year and shall be made available for inspection by authorized representatives of the department and representatives of miners.