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3

Anytime a dead wire runs parallel to a hot one, it will pick up phantom voltage. You can see it with a rather sensitive voltmeter like a modern DVM, but it won't do any useful work. In other words this is an issue with your voltmeter. Stick a dollar-store nightlight in each outlet and that will eliminate the phantoms. The bigger problem is this ...


2

Sounds like you have a Multi-wire Branch Circuit, so the breaker handles should be tied together, or a double pole breaker should be used. And each breaker should be on an opposite leg of the service, to avoid overloading the neutral. If only one breaker is on, then the other hot is floating. Which means a digital multimeter could measure anywhere from 0 ...



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