StacksVerified U.S. regulatory reference

30 CFR §75.700-1

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
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:
  1. (a)A solid connection to a borehole casing having low resistance to earth;
  2. (b)A solid connection to metal waterlines having low resistance to earth;
  3. (c)A solid connection to a grounding conductor, other than the neutral conductor of a resistance grounded system, extending to a low resistance ground field located on the surface;
  4. (d)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.