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I was looking at a customer's panel located in his apartment (multifamily dwelling) and noticed that it had 3 wire feeder and the grounding and grounded busbars were tied together. It had a main breaker located outside. This seemed to be the common setup within the complex when they were built quite a few years ago. Since this does not represent a separate building could this setup be justified by Article 250.32(B)(1) exception 1? If not, then how was this covered when the complex was built?
Thanks for any clarification.
David
Thanks for any clarification.
David