Everybody knows...

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ggunn

PE (Electrical), NABCEP certified
Location
Austin, TX, USA
Occupation
Consulting Electrical Engineer - Photovoltaic Systems
... that ground and neutral must be bonded at one and only one point, but where does the NEC say that? Someone asked me and I am somewhat embarrassed to admit that I haven't been able to find it in my code book. And yes, that Leonard Cohen song is running through my head.
 
I would just add that on the line/service side you can have as many neutrals bonds as needed for bonding of metallic items.
On the service side aren't enclosures usually bonded to neutral, or is that what you mean?
 
On the service side aren't enclosures usually bonded to neutral, or is that what you mean?
Yes, but I think we need to be clear exactly what we are talking about. Yes there is only one main bonding jumper which connects the equipment ground bus to the neutral bus. But metallic stuff can be bonded to the neutral at multiple points and also grounding electrodes can connect at multiple different points (a single point connection of the grounding electrodes might be best practice but I don't see that it is specifically required).
 
On the service side aren't enclosures usually bonded to neutral, or is that what you mean?
Yes many service side enclosures are factory bonded or have the ability to be field bonded. My point was just to point out that any and all metallic items, such as raceways, nipples, etc. on the line side can be bonded directly to the neutral and as often as required by 250.92.
 
When abating remodel hazards I have some favorite references for each hack-job violation.

Among other wiring hazards 250.142(B) was my goto reference to call out bootleg grounding.

Now I see 250.24(A)5 could have been included for clarity.
 
Sort of just reiterating my post number seven, but you and the people you were talking to need to use a more precise term than "ground".
Thanks, but in the context of our discussion "ground" is precise enough.
 
IMO no. Me and another person in this thread have questioned or pointed out that the answer will vary based on which "ground" you are talking about.
Again, you do not know the context of our discussion; we know which ground we are talking about. Whatever; I got the answer to my question. There is no need to keep flogging this dead horse.
 
There is no need to keep flogging this dead horse.

beatdeadhorse.gif
 
Just throwing this out there .. wonder why at the Main neutral bar where all the grounds and neutrals can land, why is it grounds can be doubled or tripled up but not neutrals, all are within the same bus bar potential, granted some are carrying current and some aren't. I always use a separate landing hole for my neutrals as taught, maybe the reason is its done that way is for better isolation of the specific circuits neutral for easy access, cant imagine its for heat related issues ..
 
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