StacksVerified U.S. regulatory reference

30 CFR §57.12028

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
Continuity and resistance of grounding systems shall be tested immediately after installation, repair, and modification; and annually thereafter. A record of the resistance measured during the most recent test shall be made available on a request by the Secretary or his duly authorized representative.