Question re. emergency backfeed with subpanels
I have what I hope is a quick question/answer. Let’s say I am looking at emergency backfeeding a panel (disconnected from the grid, of course) and feeding 120v to both legs. Yes, I can’t run any 240v appliances and would turn off all 240v breakers. Yes, there could be MWBC issues, depending upon how circuits are wired. However, let’s say I know that’s not a problem. Here’s the additional complication, which I’m thinking may still be a MWBC type issue. My main panel drives 2 other subpanels. I’m thinking the neutral between the main panel and each subpanel would also be a shared neutral, so it would be overloaded, if both 120 legs are in the same phase?
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