Comments on: How Do I Check If Equipment Is Running On Same Phase?

By: Iguana

Iguana — Thu, 10 Dec 2009 08:47:05 +0000

With an AC voltmeter stick one probe in the same slot of each socket. If you read zero volts they are in phase. If you read 220 they are out of phase.

By: CDog

CDog — Thu, 10 Dec 2009 06:26:36 +0000

Well if it is 110-120v ac then one wire is hot and the other neutral, and dc voltage is pos and neg, you can check that with a toy motor to see which way it spins, it will reverse when polarity is changed

By: tatereat

tatereat — Thu, 10 Dec 2009 04:27:45 +0000

oscilloscope is definitely the way to go
in phase just means that the two ac signals will peak and valley with each other
they should be the same frequency to even be in phase