scope:

This specification covers high-impact (H.I.) shockproof and vibrationproof, bulkhead mounted electrical power distribution and transfer panels using ALB, NLB, AQB, and NQB circuit breakers for feeder and branch circuit protection and control for alternating current (ac) and direct current (dc) application on naval ships.

Power distribution and transfer panels covered by this specification shall be of the following types and classes, as specified (see 6.2).

Type I - Power distribution (branch circuit protection and control) Type II - Manual transfer (bus transfer switching) Type III - Combination of types I and II. Class 1 - Dripproof (15 degrees and 45 degrees) Class 2 - Totally enclosed Class 3 - Watertight Class 4 - Submersible (15 foot)

Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Commander, Naval Sea Systems Command, SEA 55Z3, Department of the Navy, Washington, DC 20362-5101 by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter.

intended Use:

The panels are intended to be used for power and lighting distribution on ships where conditions of mechanical shock and salty atmosphere are encountered.