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Tuesday, August 1, 2017
Question:
On a 1200 amp 480/277, no main, with a six disconnect rule, do each disconnect if under 1000 amp, do I need them to GFI?
Mike Koch
A
Answer:
Hey Mike thanks for your question. Ground Fault Protection of Equipment (GFPE) must be provided for each service disconnect means rated 1000 amperes or more (under the conditions given) as stated in 230.95. If you are using multiple service disconnecting means as allowed by 230.71 and none of them are 1000 amperes or more then GFPE is not required even if adding up the ratings exceeds 1000 amperes.