J Jerry Seda New User Location Fremont CA Occupation Estimator Feb 14, 2025 #1 Hi. Is GFCI required on 1000A 277/480V circuit breaker, feeding distribution panel if the 4000A switchgear main breaker already has GFCI? Thank you
Hi. Is GFCI required on 1000A 277/480V circuit breaker, feeding distribution panel if the 4000A switchgear main breaker already has GFCI? Thank you
augie47 Moderator Staff member Location Tennessee Occupation State Electrical Inspector (Retired) Feb 14, 2025 #2 Not required
tom baker First Chief Moderator & NEC Expert Staff member Location Bremerton, Washington Occupation Master Electrician Feb 14, 2025 #3 See article 100 definitions of GFCI and GFPE.