30 CFR § 75.816
Guarding of cables.
(a) High-voltage cables must be guarded at the following locations:
(1) Where persons regularly work or travel over or under the
(2) Where the cables leave cable handling or support systems to
extend to electric components.
(b) Guarding must minimize
the possibility of miners contacting the cables and protect the cables from
damage. The guarding must be made of grounded metal or nonconductive