UL - 489 BULLETIN
UL Standard for Safety Molded-Case Circuit Breakers, Molded-Case Switches, and Circuit-Breaker Enclosures
|Publication Date:||31 May 2011|
The requirements of this standard cover molded-case circuit
breakers, circuit breaker and ground-fault circuit-interrupters
This standard covers molded-case switches and fused molded-case switches.
This standard covers devices rated at 600 volts or less and 6000 amperes or less.
The devices referenced in 1.1 and 1.2 are intended for installation in an overall enclosure or as parts of other devices such as panelboards. The acceptability of the combination will be determined when the complete product is investigated.
This standard covers circuit-breaker enclosures and accessory devices intended for use with the devices described in 1.1 and 1.2.
This standard does not cover low-voltage power circuit breakers covered in Appendix B, Ref. No. 2 and Ref. No. 3 or supplementary protectors covered in Appendix B, Ref. No. 4.
This standard contains supplements covering the requirements for molded-case circuit breakers for:
Uninterruptible Power Supply Use
Classified Circuit Breakers.
Software in Programmable Components