House with sub panel 40 feet from main in same basement. Subpanel has neutrals isolated. Grounds are separate and ground bar is bonded to panel.
There are 9 breakers in the sub panel. No main shutoff in the sub…only the 100 amp feeder breaker in the main. Since they are in the same building, I think this is OK? Can someone confirm?
Is a separate ground required from the sub panel to the main?
I will get tomorrow…just dropped off a radon CRM today and took a very quick look at the panel…will take camera back tomorrow. have a good night:) BTW…almost done with HIP template…ready to switch soon!
The only reason I always try to use the correct terminology is because I once made an embarrassing mistake. Ill never make that mistake again. I don’t even like calling equipment grounding conductors as such because its a misnomer.
It was my fault btw. Your question was pretty clear. I just read it too quickly.
All circuits that originate from the sub panel are “ungrounded” circuits, based on the description you’ve given.
If you have a three-wire feed (H+H+N) with no EGC, the fact that the circuit grounds are bonded to panel means nothing. There needs to be a connection back to the service equipment.
If you have a NM cable assembly feeding the sub panel, it needs to be rewired. The EGC must be an integrated part of the assembly. You can’t just run a separate EGC.