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UL 489A

UL Standard for Safety Circuit Breakers for use in Commmunications Equipment

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Organization: UL
Publication Date: 15 October 2008
Status: inactive
Page Count: 12
scope:

The requirements of this standard cover molded-case circuit breakers, circuit breaker and ground-fault circuit-interrupters, fused circuit breakers, and accessory high-fault protectors. These circuit breakers are specifically intended to provide service entrance, feeder, and branch circuit protection in accordance with the National Installation Codes in Appendix B, Ref. No.1. This standard also covers instantaneous-trip circuit breakers (circuit interrupters) specifically intended for use as part of a combination motor controller in accordance with the National Installation Codes in Appendix B, Ref. No. 1.

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:

a) Marine Use

b) Naval Use

c) Uninterruptible Power Supply Use

d) Classified Circuit Breakers.

e) Software in Programmable Components

Document History

October 15, 2008
UL Standard for Safety Circuit Breakers for use in Commmunications Equipment
The requirements of this standard cover single pole or multi-pole DC rated circuit breakers intended for use as branch circuit overcurrent and short-circuit protection in communications equipment....
October 15, 2008
UL Standard for Safety Circuit Breakers for use in Commmunications Equipment
The requirements of this standard cover single pole or multi-pole DC rated circuit breakers intended for use as branch circuit overcurrent and short-circuit protection in communications equipment....
UL 489A
October 15, 2008
UL Standard for Safety Circuit Breakers for use in Commmunications Equipment
The requirements of this standard cover molded-case circuit breakers, circuit breaker and ground-fault circuit-interrupters, fused circuit breakers, and accessory high-fault protectors. These circuit...
May 21, 2004
Outline of Investigation for Circuit Breakers for Use in Communications Equipment
A description is not available for this item.
June 12, 1998
Outline of Investigation for Circuit Breakers for Use in Communications Equipment
A description is not available for this item.

References

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