UL 497A
UL 497A
UL 497A addresses secondary protectors for use in single or multiple pair-type
communication circuits intended to be installed in accordance with Article 800 of the
National Electric Code and to have an operating voltage of less than 150 V rms with respect
to Ground. The purpose of UL 497A is to help reduce the risk of fire, electric shock, or injury
resulting from the deployment and use of these protectors. UL 497A requirements do not
cover telephone equipment or key systems.
UL 497A Construction, Risk of Injury, and Performance Requirements
The “Construction” section covers the following requirements:
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General
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Product Assembly
Enclosures
Internal Material
Accessibility and Electric Shock
Protection Against Corrosion
Cords
Current-carrying Parts
Internal Wiring
Interconnecting Cords and Cables
Insulating Material
Printed Wiring
Spacing
The “Risk of Injury” section covers the following requirements:
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Modular Jacks
Sharp Edges
Stability
Protection of Service Personnel
The “Performance” section covers the following requirements:
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General
Impulse Voltage Measurement
Overvoltage Test
Endurance Conditioning
Component Temperature Test
Drop Test
Crush Test
Leakage Current Test
Dielectric Voltage-withstand Test
Rain Test
Maximum Moment Measurement Test
Weather-o-meter and Micro Tensile Strength Test
Thermal Aging and Flame Test
Electric Shock Current Test
Manufacturing and Production Line Test
Marking, Installation, and Instructions
© 2002 Teccor Electronics
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+1 972-580-7777
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TECCOR [ TECCOR ELECTRONICS ]
