Measure the single phase three wire system(120V/240V) in a cost effective way

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Single-phase 3-wire systems 120V/240V (some call them two-phase or Edison) have 2 hot wires and a neutral wire. This is the most common residential system in most of the Americas. If you measure from hot wire to hot wire you will get 240 volts and if you measure from either hot wire to neutral you will get 120 volts.

Single phase 3 wire system

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