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hidden1 11-30-2012 02:02 PM

AL ground
 
Had a question and unsure how to do this without
the NEC states grounding to copper pipe has to be 5 ft or less ,i have bare AL ,and also that it must not be under 18 in of earth..
My copper line coming in at crawlspace is 4 inches above the ground for over 5 ft..
How can i properly ground the wire to pipe without violation..there is a branch off from the main there above 18 inches but its a smaller one coming off the incoming line going to laundry room.Could i ground it there even though its not main line?
any info is appreciated

hidden1 11-30-2012 02:39 PM

1 Attachment(s)
here is a picAttachment 61253

electures 11-30-2012 03:29 PM

It has to be connected within the first five feet of where it enters the building. Size of pipe doesn't matter. Aluminum can't be terminated within 18" of the ground.

hidden1 11-30-2012 05:45 PM

that pipe its connected to is over 18 inches and under 5ft from entrance but is teed off of main.

electures 11-30-2012 06:06 PM

Good to go.

parman 11-30-2012 06:09 PM

You question is a little confusing.

Are you installing a Grounding Electrode Conductor (GEC) from your main panel to your main water line? And your GEC happens to be AL?

That is what I understand from your post. If that is not the case the answer below will not apply.

Your GEC to your Main water line must be connected to your Main water line within 5' of where your water line enters the building. You also need to bond around your water meter. Your AL wire needs to be at least 18" from Earth or Concrete.

You can attach to the smaller section after the "T" as long as you meet the requirements above.

kbsparky 11-30-2012 06:25 PM

Quote:

Originally Posted by electures (Post 1063728)
It has to be connected within the first five feet of where it enters the building. Size of pipe doesn't matter. Aluminum can't be terminated within 18" of the ground.

I remember a job where they required it to be connected to the pipe before any fittings or valves were encountered. At least with the 5 foot rule, you have a bit more accessibility nowadays.

bobelectric 11-30-2012 06:29 PM

We can't use soldered joints in contact with the ground.

hidden1 11-30-2012 07:57 PM

so as far as location AFTER the T(pipe) it is ok?..that water line goes to a washer

electures 12-01-2012 05:29 PM

Quote:

Originally Posted by hidden1 (Post 1063916)
so as far as location AFTER the T(pipe) it is ok?..that water line goes to a washer

No problem. Make sure the clamp is listed for AL.

hidden1 12-02-2012 02:21 AM

1 Attachment(s)
If this applies then i will be moving it closer to entrance and lower too(not right at soil though)being that it is INSIDE...as the 18" applies OUTSIDE in this NEC infoAttachment 61301


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