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Even with the same size breakers you have to be careful. Many circuits in the US are wired using a shared neutral. These circuits must not share the same phase
by russdill 4y ago
Even with the same size breakers you have to be careful. Many circuits in the US are wired using a shared neutral. These circuits must not share the same phase and when rewiring an entire panel this seems like it'd be an easy mistake to make.
- rootusrootus 4y agoMultiwire branch circuits must be wired with tied breakers. If the person rewiring doesn't understand that this must be duplicated in the new panel, they definitely has no business upgrading their own panel.
- russdill 4y agoThis doesn't appear to have been the case until 2008, at least with multiwire branch circuits that supply separate outlets. Many if not most 100A panels with multiwire branch circuits will have been wired with breakers without ties.
- rootusrootus 4y agoI'll take your word for it, but I thought that at least as far back as 2002 it was required that the breaker for a MWBC trip both sides if one trips. I really don't like MWBCs myself, if I would've known the electrician for my house was going to utilize a bunch of them, I'd have happily paid him not to do that.