410.18(b) ex 1

**Ohm1** · #1 IP: 209.91.39.169 May 13th, 2008, 07:12 PM

Am I reading this 410.18(B) ex. 1 correctly, or did I have too much Star bucks?
The exception from the above mentioned article refers us to 250.130(c)--which states: The equipment grounding conductor of a grounding type-receptacle or a branch-circuit extension shall be permitted to be connected to any of the following:
Excep(1) Any accessible point on the grounding electrode system as described in 250.50
Does this mean you can run a single EGC from any accessible branch circuit equipment grounding conductor to ground a non-grounded light fixture?

**suemarkp** · #2 IP: 76.104.172.149 May 13th, 2008, 07:31 PM

Not sure, it says you can run a wire from the ungrounded light to the ground electrode system, and a few other places. Whether you can connect to another EGC of a nearby circuit is vague. This section says this wire can connect to a list of places. COnnecting to another EGC is not a choice, but the destination of the EGC is one of the listed places.

You can go to the grounding bar of the panel from which the circuit originated, but I think you have to use a dedicated wire. This would be kind of silly though if you have 4 lights in a row to ground. It would be nice to ground the first one to the GEC and then just diasy chain from that to the next 3 fixtures for the ground.

junkcollector · #3 IP: 64.83.225.185 May 14th, 2008, 08:43 AM

I agree.

I also don't think that you can use a grounded branch circuit's grounding conductor to ground another (ungrounded) circuit. (If that makes sense...)

The NEC is pretty unclear, but a call to the local inspector would probably return a quick "NO."

**Ohm1** · #4 IP: 209.91.39.169 May 14th, 2008, 03:24 PM

Quote:

Originally Posted by junkcollector

I agree.

I also don't think that you can use a grounded branch circuit's grounding conductor to ground another (ungrounded) circuit. (If that makes sense...)

The NEC is pretty unclear, but a call to the local inspector would probably return a quick "NO."

Actually a call to the local inspector, and a code representative returned a slow "YES".

It's kind of vague!

junkcollector · #5 IP: 64.83.225.185 May 14th, 2008, 03:45 PM

Really?

So they said that you could "borrow a ground" from another circuit?
Yes!

**Ohm1** · #6 IP: 209.91.39.169 May 14th, 2008, 03:48 PM

Oops! Yes!