PART XXXIII USE OF ELECTRICITY IN MINES — Lightning protection
695
(1) Equipment for lightning protection shall include lightning arrestors, surge capacitors, high speed protection gaps, guard wires, guard structures and air terminals.
695(2)
Where overhead lines traverse an area higher in elevation than the sites on a mine property that they interconnect, and where natural conditions require those measures, an overhead lightning-protection wire with supplementary ground electrodes at the high points shall be provided.
695(3)
Where mine headframes, pipe services, tracks, cables, or other non-system conductors that enter the mine are in danger of being struck or charged by lightning, they shall be protected at the surface by lightning-protection wires or structures grounded by low-resistance grounds as in lightning arrestors.
Not legal advice. Verify the cited article against the signed agreement.