QUESTION: WITH AC POWER, AREN'T BOTH WIRES OF THE PAIR INTERCHANGABLE? Â Why is one wire called "neutral?" Â What's all this stuff about "grounding?" Why are three prongs needed? Also see below: WHY "GROUND" IS CONFUSING __________________________ / \ / _ \ | | | _ | | | | | | | | | | | | | | | | | | | | | | | | | | | | |_| | | |_| | | ____ | | / \ | | | | | | |______| | \ / \_____________________
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