46 C.F.R. § 111.81-3 Cables entering boxes.
Title 46 - Shipping
Each cable entering a box or fitting must be protected from abrasion and must meet the following: (a) Each opening through which a conductor enters must be closed. (b) Cable armor must be secured to the box or fitting. (c) Each cable entrance in a damp or wet location must be made watertight by a terminal or stuffing tube.
Title 46: Shipping
PART 111—ELECTRIC SYSTEMS—GENERAL REQUIREMENTS
Subpart 111.81—Outlet Boxes and Junction Boxes
§ 111.81-3 Cables entering boxes.

