1 Scope

1.1 The requirements herein cover three-pole, low-voltage, AC power circuit breakers, drawout mounted type, cradles, applicable accessories, and functional components intended for use aboard non-nuclear, naval combatant ships in electrical assemblies (switchboards and load centers) installed on shock isolators (mounts) or in non-nuclear, naval hard-mounted electrical assemblies that do not have to meet shock and vibration requirements. The requirements herein also cover COTS circuit breakers and applicable accessories/functional components intended for use aboard non-combatant and auxiliary naval ships. Successful initial qualification testing and requalification testing of circuit breakers, cradles, and applicable accessories/functional components to the requirements herein shall constitute allowance of their use in applications described above.

Note – See 3 concerning use of a UL 1066A circuit breaker in the applications noted in 1 with respect to rated current.

1.2 The requirements herein cover COTS, power circuit breakers with electronic trip units only.