What UL rating is preferred for a surge suppressor?
A)UL497A
B)UL1497A
C)UL1449
D)1750 joules

Question

Quizplus · Accepted Answer

UL1449 is the preferred UL rating for surge suppressors as it specifically tests the device's ability to suppress high-energy surges and spikes, which are the most damaging to electronic equipment. UL497A and UL1497A are outdated standards and do not test the suppressor's ability to handle larger surges. 1750 joules is not a UL rating, but rather a measure of the suppressor's capacity to absorb excess power, which is important but not as important as the UL rating when it comes to surge protection.

What UL Rating Is Preferred for a Surge Suppressor