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-   -   Multi wire branch circuit question (http://www.diychatroom.com/f18/multi-wire-branch-circuit-question-186377/)

mikedabike64 09-02-2013 04:46 PM

Multi wire branch circuit question
 
I have a multi wire red black neutral,
the Black is on one breaker and the red is on another breaker
the white neutral goes to the white neutral buspar,
my question is
I see that there is no ground
but if I pull a receptacle that is powered by this multi branch circuit
it does have a ground,
at this point does this sound correct?
the reason I am asking is
I have a tester that you plug in and I get a 2 yellows,
this is good this is correct but it is a weak yellow,
like it wants to say open ground but it can't,
I only have this issue on the
the multi branch circuit all the other receptacles are fine,
should I be tracing a ground wire somewhere?
I am more curious than anything else,
the multi branch powers several receptacles in the kitchen
as well as a outside receptacle,

another older outside receptacle was decommissioned by a electrician a few years back,
and I suspect that there might be a loose ground from where he disconnected it
my multi meter tester shows voltage from
hot to neutral 120
hot to ground 94 not good.
neutral to ground 12 ? Also not cool.

I have been mystified by this ghost in the machine for a few years.
The outlets are never used,
the outside receptacle connected to the circuit works as it should with no problems, no ground issues, and is very close to the inside receptacles.

I was thinking I could ground the receptacles to the known good ground & retest it.. :)

Thanks,

TarheelTerp 09-02-2013 05:01 PM

Quote:

Originally Posted by mikedabike64 (Post 1237263)
I have a multi wire red black neutral the Black is on one breaker and the red is on another breaker the white neutral goes to the white neutral buspar,
my question is... I see that there is no ground

Until the 60's it was uncommon for ANY circuit to be grounded.
Even today, most things that you'll plug in don't have grounds and so the receptacle doesn't really need to be grounded.

That you're observing this on a multi-wire circuit makes no difference.

mikedabike64 09-02-2013 05:13 PM

ok
 
Thanks, so I am NOT crazy, :)

mpoulton 09-02-2013 06:26 PM

If the receptacle is three-prong, then it must actually be grounded - or protected by a GFCI and marked "no equipment ground". It appears that you have an ungrounded circuit which was extended with grounded cable and grounded receptacles, but the grounding conductor was not run back to the panel. That is not code compliant or safe.

mikedabike64 09-02-2013 06:49 PM

ok thanks,
 
Ok, that makes sense

romex1220 09-02-2013 07:24 PM

I actually came across the same thing today. Outlet with ground connected but back at j box, ground is snipped back to sheathing. I don't know why they didn't connect to the ground that was right in front of them. But I have a plug tester and the middle yellow lights up fine but the right one barely lights up. I reconnected ground at j box and tests fine

mikedabike64 09-03-2013 03:19 PM

ground
 
romex you found the loose ground at the j box? glad you found it, I was afraid when i posted this that people would think I had a weird question, :laughing: If nothing else least Iam barking up the right tree,:) the wiring to the receptacle is accessible via a crawlspace, maybe I will get lucky and find it closer to entrance.

romex1220 09-03-2013 03:44 PM

No, I found it at a j box. Ground was just snipped and not connected. Not sure if they ran out of wirenuts or crimp connectors


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