Ground wire in conduit

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Old 10-04-01, 11:22 AM
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Ok, so I'm running 2 seperate circuts through conduit. Is it ok to run just 1 ground wire? The 2 circuts are different amperage 14 & 12 amp. Not that I want to do it on this run but I was told once that you can also use 1 neutral for 2 circuts. Is this still accepted by the NEC?Thanks Tim
 
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  #2  
Old 10-04-01, 12:41 PM
resqcapt19
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Tim,
The neutral(white) and the ground(green or bare) are not the same conductor.
You are permitted to use one equipment grounding conductor for all of the circuits in the same raceway as long as it is sized based on the largest overcurrent device protecting the circuits in the raceway. See 250-122(c).
The two circuits would be permitted to share a neutral as long as these circuits originate on the opposite bus bars. That is that there must be 240 volts between the two hots. In this case if you use a common neutral to create a multiwire branch circuit the neutral would have to be a #12.
Don(resqcapt19)
 
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Old 10-04-01, 02:15 PM
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Thanks Don.
 
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