UL1283 vs UL1449

UL 1449 is the safety standard for “TVSS”, Transient Voltage Surge Suppressors.  The appropriate safety listing for a surge suppressor that uses MOVs as clamping components is UL 1449.  These types of Plug-In devices clamp and divert surges, and wear out with use.

UL 1283 is the safety standard for “Electromagnetic Interference Filters”.  Zero Surge technology is filter technology.  Since surges consist of a brief burst of high frequency energy, surges can be eliminated using appropriate filtering technology.  This technology does not wear out with use.

A-1-1 Certification

All Zero Surge products meet the A-1-1 Classification.

A-1-1 Surge Suppression Classification:

Surge suppression has been classified by the US Government using the following terminology:

• Grade A is the best endurance:  1,000 surges of 6,000 volts, 3,000 amps with no degradation.
• Class 1 specifies the best voltage suppression of 330 volts peak for 6,000 volt, 3,000 amp surges.
• Mode 1 is Line to Neutral suppression.  This avoids ground wire contamination.