On Wed, 19 Oct 2011 08:59:38 -0400, "Stormin Mormon"
wrote:

Three bulb tester would not pick up on it. Typical house
power has two "hot" wires, and a neutral. If the neutral is
not properly connected, sometimes the power is unbalanced.
One leg might be showing 130 volts, the other showing 90
volts. Depending on what appliances are being used.

He measured the voltage, no? That's all that should be required. With a
missing neutral, if one side is high, the other leg should be equally low.

Others have suggested to watch with volt meter, and see if
the voltage spikes and dips.