StacksVerified U.S. regulatory reference

30 CFR §77.900-2

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
The operator shall maintain a written record of each test, examination, repair or adjustment of all circuit breakers protecting low- and medium-voltage circuits serving three-phase alternating current equipment and such record shall be kept in a book approved by the Secretary.