I just added a circuit to my breaker box and it got me thinking about how the wiring all works. The neutral and ground both go to the bad bar in the circuit box, if they’re both in the same place then why can’t that just be wired inside the outlet and a single wire runs the length instead of two?
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One carries current under normal use and the other is only there to maintain a safe voltage level without carrying current (except in fault conditions). If only one wire was used there would be no guaranteed safe voltages at the parts of your appliances that you touch.
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