grounding

[FastTracker]

can you ground a panel that's 40 years old with no ground wire just a pipe ground from a new panel being installed 40 ft away by running a pipe over and tapping off the ground buss in the new panel

 

[ActionDave]

If the old panel is fed with metallic conduit then it is already equipment grounded and nothing needs to be done.

A wire type equipment grounding conductor has to be installed in the same pipe as the other circuit conductors.

 

[FastTracker]

the owner wants a grnd wire to the old panel
you say its only legal if its in the old conduit?

 

[Ponchik]

What do you mean by "ground it"?

you mean equipment ground or grounding electrode ground?

I think in this situation it is best to draw a picture and let the forum see what you have.

 

[FastTracker]

I don't see anywhere where I said "Ground it"

 

[ActionDave]

the owner wants a grnd wire to the old panel
you say its only legal if its in the old conduit?

Yes. 300.3(B).

 

[FastTracker]

Thanks Dave

 

[Ponchik]

I don't see anywhere where I said "Ground it"

I am sorry my bad. "ground the panel"

 

[kwired]

I don't see anywhere where I said "Ground it"

"Grounding" it would be to connect it to a grounding electrode, "bonding" it would be connecting it to a conductor that ensures it is at same potential as other conductive objects - in particular the "equipment grounding conductor".

As mentioned metal raceways in general are allowed to be used for that purpose.