P6002ACMC datasheet(148/212 Pages) TECCOR

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UL 497

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SIDACtor® Data Book and Design Guide

UL 497

UL 497 Series of Safety Standards

The UL 497 series is a family of three safety standards that provides requirements for

protection devices used in low-voltage circuits.

• UL 497 addresses requirements for primary protectors used in paired communications

circuits.

• UL 497A covers secondary protectors for use in single or multiple pair-type

communications circuits.

• UL 497B addresses protectors used in data communication and fire alarm circuits.

• UL 497C addresses protectors for coaxial circuits.

The focus of UL 497 is to ensure that paired communication circuit protectors do not

become a fire or safety hazard. The requirements in UL 497 cover any protector that is

designed for paired communications circuits and is employed in accordance with Article 800

of the National Electric Code. The protectors covered in UL 497 include solid state primary

and station protectors. These circuit protectors are intended to protect equipment, wiring,

and service personnel against the effects of excessive voltage potential and currents in the

telephone lines caused by lightning, power cross, power induction, and rises in Ground

potential.

UL 497 Construction and Performance Requirements

The “Construction” section covers the following requirements:

• General

• Enclosures

• Protection Against Corrosion

• Field-wiring Connections

• Components

• Spacing

The “Performance” section covers the following requirements:

• General

• Line Fuse Test

• Instrument Fuse Test

• Arrestor Test

• Polymeric Material Test

• Rubber Materials Test

• Corrosion Test, Outdoor Use Protector

• Jarring Test

• Water Spray Test

• Drop Test

• Cover Replacement Test

• Strain Relief Test

• Replacement Arrestors Installation Test

• Appliqué Assemblies Installation Test

• Dielectric Voltage-withstand Test

• Manufacturing and Production Tests

• Marking

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