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May 7 at 13:15 history edited ratchet freak CC BY-SA 4.0
deleted 16 characters in body
May 7 at 12:45 comment added Jon Custer "As for why it's"... It's what? (I presume incomplete edit)
May 7 at 12:20 comment added Ecnerwal @EvilElf if a subpanel is installed downstream, properly as a subpanel, with isolated neutral and ground in the sub-panel, there is no "very dangerous situation." Bonding in the main is standard and normal. If a new main is installed upstream, for instance a retrofit outside disconnect and/or service upgrade, then the former main must, as part of that change, be converted into an unbonded sub-panel with isolated neutral and ground. Your statement as written reads as vague fear from lack of understanding.
May 7 at 11:47 comment added Evil Elf It is my understanding that the neutral and ground bars serve as one redundant point in the MAIN panel, but can lead to very dangerous situations if an auxiliary panel is ever installed.
May 7 at 10:57 history answered ratchet freak CC BY-SA 4.0