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Discussion Starter · #1 · (Edited)
I am working on a 5 story building. We are feeding( these are feeders on a 600A Breaker) each floor via feed through(panel to panel) from floor to floor. We are punching our own 3 1/2 inch hole's. Do we need bond bushings?:001_huh:
We are having much disagreement about this subject and can't find it anywhere in NEC
 
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