StacksVerified U.S. regulatory reference

46 CFR §111.01-13

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
Porcelain must not be used for lamp sockets, switches, receptacles, fuse blocks, or other electric equipment where the item is solidly mounted by machine screws or their equivalent, unless the porcelain piece is resiliently mounted.