30 CFR § 77.508 Mandatory Safety Standards, Surface Coal Mines and Surface Work Areas of Underground Coal Mines

§ 77.508 Lightning arresters, ungrounded and exposed power conductors and telephone wires.

Current through Jul 27, 2026 · Read all of Part 77

All ungrounded, exposed power conductors and telephone wires shall be equipped with suitable lightning arresters which are adequately installed and connected to a low resistance grounding medium.

← § 77.507 Electric equipment; switches.§ 77.508-1 Lightning arresters; wires entering buildings. →