PDF Standards UL 497

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These requirements cover protectors for paired-conductor communications circuits to be used in accordance with Article 800 of the National Electrical Code,NFPA 70.

As covered by these requirements, a communications circuit protector consists of single- and multiple-pair air gap arresters, gas tube arresters, or solid statearresters, with or without fuses or other voltage-limiting devices. A circuit protector is intended to protect equipment, wiring, and personnel against the effects ofexcessive potentials and currents in telephone lines caused by lightning, contacts with power conductors, power induction, and rises in ground potential.

Product Details

Edition:

7th

Published:

01/01/2001

Number of Pages:

54

Note:

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