If you know that unit is 120, the test would load one leg. if it is wired for partial 220, it would not work. The neutral failure is not tested when a 220 volt draw is applied, as the phase relationship is between hots, not the neutral. Load only one 120volt circuit/phase. It could take 1500 watts on 2 circuits on the same branch to get it into failure mode. Not easy to detect, and sometimes self healing for light loads or loads that are not turned on for a long time (hours). The danger is real to much of the equipment in your place. it will get 220 on one leg eventually and near nothing on the other. It can be at the wetherhead, the incoming neutral bond to the panel, at the pole connections at the wires, or the meter internal neutral connects, or the transformer. Best of luck finding it it will not go away. Jim
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Today's Featured Article - What Price Enthusiasm? - by Anthony West. Quite frankly, for some time now restorers like myself have become more and more concerned about the rapid increase in the prices of old farm machines here in England. There is now a growing market for "As found" machines. Which as machines get rarer, has found the birth of a new industry....one of the "procurement agent". These agents appropriate as much old machinery as possible then inflate prices at auctions. So at what price enthiusiasm? We are now seeing poor machines which 3 years ago ma
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