UL Outline for Investigation Molded-Case Circuit Breakers@ Molded-Case Switches@ and Circuit-Breaker Enclosures@ for Use with Direct Current (DC) (Issue 1)
These requirements cover molded-case circuit breakers@ molded-case switches@ and circuit-breaker enclosures rated up to 1000 V dc@ intended for use with Direct Current (DC) Microgrid systems and Article 712 of the National Electrical Code@ ANSI/NFPA-70. These requirements are intended to be used in conjunction with the requirements in the Standard for Molded-Case Circuit Breakers@ Molded-Case Switches and Circuit-Breaker Enclosures@ UL 489@ hereafter referred to as UL 489@ except as modified or supplemented by this Outline.