What is the typical test frequency that others see or implement for testing of LV 480 VAC molded case breakers? In this case - 400 - 1200 A breakers with electronic trips, installed in facility switchboard. NFPA 70B (2016) recommends electrical testing every 3-5 years. What percentage of facilities do you see maintaining this schedule? Is secondary injection testing at those time intervals typical?
Thanks for any input
Thanks for any input