StacksVerified U.S. regulatory reference

30 CFR §57.12004

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
Electrical conductors shall be of a sufficient size and current-carrying capacity to ensure that a rise in temperature resulting from normal operations will not damage the insulating materials. Electrical conductors exposed to mechanical damage shall be protected.