30 CFR § 77.503 Mandatory Safety Standards, Surface Coal Mines and Surface Work Areas of Underground Coal Mines

§ 77.503 Electric conductors; capacity and insulation.

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

Electric conductors shall be sufficient in size and have adequate current carrying capacity and be of such construction that a rise in temperature resulting from normal operation will not damage the insulating materials.

← § 77.502-2 Electric equipment; frequency of examination and testing.§ 77.503-1 Electric conductors. →