StacksVerified U.S. regulatory reference

30 CFR §57.22303

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
Only electrical equipment that is approved by MSHA under the applicable requirements of 30 CFR parts 18 through 28 or approved under 30 CFR part 29 contained in the 30 CFR, parts 1-199, edition, revised as of July 1, 1999, shall be used underground, except for submersible sump pumps.