It’s live, not positive.
Electric circuits work by something pushing or pulling the electricity. In DC, it’s getting pushed in a certain direction. In AC, it’s getting pushed one way then pulled the other in rapid succession. But it’s still being driven from the same place!
In other words, the “live” wire is the one actually trying to shift electrons. The neutral wire is just there so the electrons have somewhere to go or something to get pulled from. If you connect live to the ground (either directly or via…you) then the live wire can still drive the current.
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