grounding electrode conductor must be connected to

[suemarkp]

Terminology is everything.

Since it is a Main Distribution Panel and NOT a Main SERVICE Panel, then my answer would be "C."

Then why are you putting a ground electrode at a non-service panel? You're not prohibited from doing that, but the system GEC is to connect to the service neutral between the service point and the main disconnect. I'd consider a GEC at a subpanel to have a splice in it and not be allowed.

 

[sandsnow]

Then why are you putting a ground electrode at a non-service panel? You're not prohibited from doing that, but the system GEC is to connect to the service neutral between the service point and the main disconnect. I'd consider a GEC at a subpanel to have a splice in it and not be allowed.

Just my way of pointing out the vaugeness of the question that has been mentioned.

You're exactly right a GEC does not normally belong in a Main Distribution Panel except where it is at a second building for instance. A GEC belongs at the service therefore the question writer should have put SERVICE in the question.

If we all used the same terms starting with terms defined in the NEC and not terms derived from common usage which vary from coast to coast; then we would all understand each other better.

Also going for laughs at the question writers expense. As far as getting laughs goes, I know - "Don't quit my day job".