30 C.F.R. § 18.49 Connection boxes on machines.
Title 30 - Mineral Resources
Connection boxes used to facilitate replacement of cables or machine components shall be explosion-proof. Portable-cable terminals on cable reels need not be in explosion-proof enclosures provided that connections are well made, adequately insulated, protected from damage by location, and securely clamped to prevent mechanical strain on the connections.
Title 30: Mineral Resources
PART 18—ELECTRIC MOTOR-DRIVEN MINE EQUIPMENT AND ACCESSORIES
Subpart B—Construction and Design Requirements
§ 18.49 Connection boxes on machines.
