---
kind: "section"
citation: "30 C.F.R. § 75.701-4"
title: "30"
number: "75.701-4"
heading: "Grounding wires; capacity of wires."
url: "https://uscodex.org/cfr/30/75.701-4"
---

# §75.701-4. Grounding wires; capacity of wires.


Where grounding wires are used to ground metallic sheaths, armors, conduits, frames, casings, and other metallic enclosures, such grounding wires will be approved if:

- (a) 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.
- (b) 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

### Authority

Authority: 30 U.S.C. 811, 813(h), 957.

### Source

Source: 35 FR 17890, Nov. 20, 1970, unless otherwise noted.