Motors and Voltage Imbalance, Part 3

We noted previously that voltage imbalance usually arises from within the facility. Two causes we already discussed are improper allocation of single phase loads and poor connections in your premises wiring.

In an actual case, the problem was the supply conductors were different sizes. This isn’t common, but it does happen. Differing conductor lengths can also cause imbalance.

Be sure you check for poor connections elsewhere on the load side of the disconnect (including

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