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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 single pole or multi-pole DC rated circuit breakers intended for use as branch circuit overcurrent and short-circuit protection in communications equipment.

All poles of multi-pole circuit breakers covered by this standard operate at the same potential.

The requirements of this standard cover devices rated 600 volts DC or less.

This standard is intended to be used with the Standard for Molded-Case Circuit Breakers, Molded-Case Switches and Circuit-Breaker Enclosures, UL 489, as the requirements of this standard modify tests described in that standard.

Unless otherwise specified, when the term "circuit breaker" is used in this standard, it refers to a circuit breaker intended for use with communications equipment.

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 molded-case circuit breakers, circuit breaker and ground-fault circuit-interrupters, fused circuit breakers, and accessory high-fault protectors. These circuit...
UL 489A
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....
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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