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01-14-2008, 02:59 PM   #1
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## Testing circuits

I was installing an outlet box last night. Naturally, the circuit was de-energized while I worked on it. Before energizing the circuit, I wanted to check out my work with a multimeter. My thinking was that I should not get continuity between the hot and neutral. However, when I plugged the leads into the respective sockets, there was continuity. This didn't seem right, yet other plugs in the house tested out the same way.

It seems like I've run into this before years ago, without understanding exactly why this is the case.

I decided that everything was wired properly and flipped the breaker. Upon testing, the outlet had normal voltage, as one would expect.

What is it that I don't understand about AC electricity that would indicate continuity between the hot and neutral wires in a circuit that has been de-energized?

01-14-2008, 03:48 PM   #2

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You are measuring the resistance across something on that circuit that is in the on position. Maybe a lamp or transformer?

 01-14-2008, 03:57 PM #3 Member   Join Date: Oct 2007 Posts: 2,294 Rewards Points: 1,000 Follow the path grasshoppa. If a light (for example) is switched on anywhere on that circuit, that is where your continuity comes from.

01-14-2008, 04:02 PM   #4
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Quote:
 Originally Posted by HouseHelper You are measuring the resistance across something on that circuit that is in the on position. Maybe a lamp or transformer?
DOH! Of course! That would explain it. Thanks.

01-14-2008, 07:22 PM   #5
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Quote:
 Originally Posted by 220/221 Follow the path grasshoppa.
220 is dead on here. It is all about the circuit. It is a big Merry Circle we live in called a circuit. OHMS are always read thru a resistive path...

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