§77.701-3. Grounding wires; capacity.
30 C.F.R. § 77.701-3
Where grounding wires are used to ground metallic sheaths, armors, conduits, frames, casings, and other metallic enclosures, such grounding wires will be approved if:
Where the power conductor used is No. 6 A.W.G., or larger, the cross-sectional area of the grounding wire is at least one-half the cross-sectional area of the power conductor.
Where the power conductor used is less than No. 6 A.W.G., the cross-sectional area of the grounding wire is equal to the cross-sectional area of the power conductor.
Notes, amendments, and revision history
Authority
Authority: 30 U.S.C. 811.
Source
Source: 36 FR 9364, May 22, 1971, unless otherwise noted.