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-   -   ohms at 110 outlets with the CB open? (http://www.diychatroom.com/f18/ohms-110-outlets-cb-open-133863/)

a6pilot 02-15-2012 05:25 PM

ohms at 110 outlets with the CB open?
 
I get 18-20 oms accross my 110 outlets with the CB open. Why or is this normal?

fdiddy 02-15-2012 05:30 PM

You have something plugged into another plug on the same circuit?

Speedy Petey 02-15-2012 05:31 PM

Why would you be checking this??? :huh:

gregzoll 02-15-2012 06:31 PM

Quote:

Originally Posted by a6pilot (Post 854429)
I get 18-20 oms accross my 110 outlets with the CB open. Why or is this normal?

Okay. And your point is?

Yoyizit 02-15-2012 08:07 PM

Quote:

Originally Posted by a6pilot (Post 854429)
I get 18-20 oms accross my 110 outlets with the CB open. Why or is this normal?

If nothing is plugged into any outlet and all switches are off, then no - you should read many megohms or gigaohms.

If something is plugged into one or more outlets, then maybe. The cold resistance of a 50w incand. bulb could read like this.

If your meter has a diode check you may get even more puzzling readings from these outlets.

What's even more difficult to explain is why this kind of question annoys people. :laughing:
I guess it's because you're first supposed to have a purpose in making measurements, rather than making measurements first and then wondering what they could mean.

AllanJ 02-15-2012 09:02 PM

Never try to measure ohms or continuity with the power on.

You can fry the meter.

Speedy Petey 02-15-2012 09:27 PM

Quote:

Originally Posted by Yoyizit (Post 854593)

What's even more difficult to explain is why this kind of question annoys people. :laughing:

And you say this why? Did someone in the room with you get annoyed when they read it?

mpoulton 02-15-2012 09:29 PM

Quote:

Originally Posted by Yoyizit (Post 854593)
What's even more difficult to explain is why this kind of question annoys people. :laughing:
I guess it's because you're first supposed to have a purpose in making measurements, rather than making measurements first and then wondering what they could mean.

It's alarming because using a resistance meter on a circuit that is wired to a power source is something that should only be done if you know what you're doing. Accidentally trying to measure the resistance of a power source produces a fireworks display. I think it's fair to say that if someone is perplexed by these results, they shouldn't be using an ohmmeter on anything that's connected to the panel.

jlmran 02-15-2012 09:42 PM

What is an om?

brric 02-15-2012 09:44 PM

Quote:

Originally Posted by jlmran (Post 854688)
What is an om?

That's what one chants when meditating.

jlmran 02-15-2012 09:46 PM

Quote:

Originally Posted by brric
That's what one chants when meditating.

Jackie Gleason did it well in a famous (?) Trans-Am movie.

ddawg16 02-15-2012 09:47 PM

I would look for a door bell or HVAC transformer.....your 'ohm' reading sounds about right for one of those....

brric 02-15-2012 09:53 PM

Quote:

Originally Posted by jlmran (Post 854691)
Jackie Gleason did it well in a famous (?) Trans-Am movie.

Smokey and the Bandit?

jlmran 02-15-2012 09:54 PM

Quote:

Originally Posted by brric
Smokey and the Bandit?

Nope...Smokey and the Bandit II.

curiousB 02-16-2012 06:32 AM

This is why I love my clamp on ammeter. Just clamp it around the hot wire on the breaker and see what current is being drawn. I only spent $25 or so for it. It's not a Fluke but good enough for my usage.

I got it from harbor freight tools.


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