---
kind: "section"
citation: "30 C.F.R. § 77.700-1"
title: "30"
number: "77.700-1"
heading: "Approved methods of grounding."
url: "https://uscodex.org/cfr/30/77.700-1"
---

# §77.700-1. Approved methods of grounding.


Metallic sheaths, armors, and conduits in resistance grounded systems, where the enclosed conductors are a part of the system, will be approved if a solid connection is made to the neutral conductor; in all other systems, the following methods of grounding will be approved:

- (a) A solid connection to metal waterlines having low resistance to earth;
- (b) A solid connection to a grounding conductor, other than the neutral conductor of a resistance grounded system, extending to a low-resistance ground field;
- (c) Any other method of grounding, approved by an authorized representative of the Secretary, which ensures that there is no difference in potential between such metallic enclosures and the earth.

## Notes

### Authority

Authority: 30 U.S.C. 811.

### Source

Source: 36 FR 9364, May 22, 1971, unless otherwise noted.