Ground fault?


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Old 06-10-14, 03:47 PM
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Ground fault?

Circuit that contains a couple of can lights and two outlets.

I can test continuity (audible alarm) while power is on with my multimeter. I have continuity at the outlets between ground and neutral with the power on but the lights off. When you switch the lights on, there is no audible alarm (ie no continuity.

With the breaker off, there is constant continuity between neutral and ground at the outlets.

Do I have a ground fault on this circuit?
 
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Old 06-10-14, 05:22 PM
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You can't test continuity with power applied. The breaker being on or off will not have anything to do with continuity to the neutral/ground bus in the panel. What prompted you to do this check? Are you having problems? If so, describe them.
 
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Old 06-10-14, 05:42 PM
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You can't test continuity with power applied.
Yes, certain meters have this function. The low impendence meters can do this.

With that said... there should always be continuity between ground and neutral at an outlet (whether you check with power on or off) since they are bonded in the panel... is that a fair assessment?

Or would you not be able to detect the bond upstream of the panel?
 
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Old 06-10-14, 05:48 PM
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Please tell us your problem. So far we have some questionable testing but nothing to tell us the problem is.
 
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Old 06-10-14, 05:50 PM
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Not sure if I have a problem to report Ray... hence the question.
 
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Old 06-10-14, 05:58 PM
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Since ground and neutral at the first OCPD are connected together you should see continuity. If connected to a service panel other than the first OCPD and wired according to NEC 2008 or later you may see a slight resistance depending on soil conductivity and other unknowns.
 
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Old 06-10-14, 06:03 PM
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So the neutral/ground bond I am seeing at the outlet on a branch circuit is normal since they are bonded together at the panel?
 
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Old 06-10-14, 06:09 PM
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Yes.

.
 
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Old 06-10-14, 06:31 PM
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You can also see continuity from hot to neutral through an incandescent light bulb.
 
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Old 06-10-14, 08:18 PM
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A ground fault is when current bypasses the neutral wire and leaks to ground. You are only measuring continuity, not current.
 
 

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