§75.701-4. Grounding wires; capacity of wires.
30 C.F.R. § 75.701-4
Where grounding wires are used to ground metallic sheaths, armors, conduits, frames, casings, and other metallic enclosures, such grounding wires will be approved if:
The cross-sectional area (size) of the grounding wire is at least one-half the cross-sectional area (size) of the power conductor where the power conductor used is No. 6 A.W.G., or larger.
Where the power conductor used is less than No. 6 A.W.G., the cross-sectional area (size) of the grounding wire is equal to the cross-sectional area (size) of the power conductor.
Notes, amendments, and revision history
Authority
Authority: 30 U.S.C. 811, 813(h), 957.
Source
Source: 35 FR 17890, Nov. 20, 1970, unless otherwise noted.