One-Way Volt Readings - Electrical - Engineer Boards
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One-Way Volt Readings

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I have two 120 v lines providing power to my shop from which a simple 3-prong 240 v outlet is wired, using two breaker switches.  Upstream of the breaker panel, but downstream of the utility socket, one of them reads ~120 v with my voltmeter leads switched either way, with respect to ground.  The other reads ~5 v in one direction, and ~120 v in the other.  What could cause this?  Ultimately, I need to know whether the problem is my responsibility, or the power company's.

It is a problem, right?

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