46 C.F.R. § 111.30-3 Accessibility of switchboard components and connections.
Title 46 - Shipping
Each component and bus bar connection on a switchboard that is not accessible from the rear, except a bus bar connection for a draw-out type circuit breaker, must be within 0.5 m (20 in.) of the front of the switchboard.
Title 46: Shipping
PART 111—ELECTRIC SYSTEMS—GENERAL REQUIREMENTS
Subpart 111.30—Switchboards
§ 111.30-3 Accessibility of switchboard components and connections.
