C.F.R. » Title 46 » CHAPTER I—COAST GUARD, DEPARTMENT OF HOMELAND SECURITY › SUBCHAPTER J—ELECTRICAL ENGINEERING › PART 111—ELECTRIC SYSTEMS—GENERAL REQUIREMENTS › Subpart 111.01—General

46 C.F.R. § 111.01-13

Limitations on porcelain use

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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.