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Subject - electrical bonding /grounging
wingkwong my electrical service comes into the house on the east side of the house. the water comes from the west side through a pvc pipe. I have a outside water faucet south side of the house.

I see ground wires both from the east facing outside electrical service box and the south facing outside water faucet goes into the ground. Are they grounded separately or bonded together and then grounded with only one ground rod? And why is there no ground wire connected to the faucet right before the water goes into the house on the west side. I was told that the water pipes are copper under the cement slab.

Please explane, Thanks
lctrc789 Tam, I am not sure if you are talking an I beam for support in this place in place of a wooden girter beam, or metal ran for support of the drop ceiling.
If it is an I beam then it has to be grounded yes. 250-104 is right.(a) 1. As well as for the water piping too.
Another article on this would be 250-50 (a) 1 2
I tell every one that all county/city codes can supersede the NEC by their own regulations.
If you have any questions let us know.
MrsSparky I have a question guys, I am having a problem. One of my builders has a tendancy to build garages, underneath them they have the beam supports, the suspended ceilings if you will. The inspector wants us to run a ground to this. Have you ever heard of this, what article if so. Thanks!
Also one more quick one. In the basement of one of these houses the home owner wanted plumbing roughed in the slab for future wet bar, not right now, for future finishing. This same inspector wants me to run a ground from the water line to the copper. Yes he really wants me to run it down the wall and connect it to the plumbing in the floor. Is he yanking my chain?
Thanks for your help guys, sometimes I feel like this guy is giving me a hard time because I am A female Electrician.
iwire
quote:
Originally posted by MrsSparky

underneath them they have the beam supports, the suspended ceilings if you will. The inspector wants us to run a ground to this.


I am not sure if I follow you, are we taking about suspended ceiling grid or structural steel supporting the garage?

If it is structural steel the inspector could require it to be bonded.

quote:
250.104(C) Structural Steel. Exposed structural steel that is interconnected to form a steel building frame and is not intentionally grounded and may become energized shall be bonded to the service equipment enclosure, the grounded conductor at the service, the grounding electrode conductor where of sufficient size, or the one or more grounding electrodes used. The bonding jumper(s) shall be sized in accordance with Table 250.66 and installed in accordance with 250.64(A), (B), and (E). The points of attachment of the bonding jumper(s) shall be accessible.



quote:
Originally posted by MrsSparky

In the basement of one of these houses the home owner wanted plumbing roughed in the slab for future wet bar, not right now, for future finishing. This same inspector wants me to run a ground from the water line to the copper. Yes he really wants me to run it down the wall and connect it to the plumbing in the floor. Is he yanking my chain?


Metal water piping must be bonded, if it is not already bonded by the GEC.

quote:
250.104 Bonding of Piping Systems and Exposed Structural Steel.
(A) Metal Water Piping. The metal water piping system shall be bonded as required in (1), (2), (3), or (4) of this section. The bonding jumper(s) shall be installed in accordance with 250.64(A), (B), and (E). The points of attachment of the bonding jumper(s) shall be accessible.

(1) General. Metal water piping system(s) installed in or attached to a building or structure shall be bonded to the service equipment enclosure, the grounded conductor at the service, the grounding electrode conductor where of sufficient size, or to the one or more grounding electrodes used. The bonding jumper(s) shall be sized in accordance with Table 250.66 except as permitted in 250.104(A)(2) and (A)(3).
MrsSparky Thanks guys I guess he is just doing his job. It was a steel support system sorry about throwing the suspended ceiling crap in there, kids must've been yelling :) So as far as the slab goes it wasn't originaly on the plans so we didn't know about it otherwise I would have stuck it in the slab. Thanks for all you info guys! Really, I would have been on this inspectors *hit list otherwise with the bitching I was about to bring on. :)
Speedwire1 One last thought. I think that a lot of violations would go away if the contractor would stand up for themselves and ask what the reference for the violation is. Always remember...If it's not written, it's not real!