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Joined: Nov 2002
Posts: 558
G
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Train, the only time I ever saw anything like this, they drilled the wall and put in rebar, and made a sort of rebar cage. Then formed it and poured concrete in.

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Joined: Oct 2000
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so how far does the wireway extend here?

Joined: Apr 2002
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Sparky:
A pure guess; judging by the eyeball of experience, I would venture 3 to 4 feet of conduit.
John


John
Joined: Nov 2002
Posts: 558
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Joe, have you ever seen this in a residental setting that was quite a distance inside the building?

[This message has been edited by ga.sparky56 (edited 02-11-2003).]

Joined: Aug 2002
Posts: 141
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When working for a utility who did not install code sized cables, I required the electrical contractor to install the point of service termination within 18 inches of where it entered the building. IE: If the service conduits entered thru the floor, the bottom of the termination was supposed to be within 18 inches of the floor. Often times the contractor installed it wherever he pleased and the inspector signed it off anyway.
bob

Joined: Oct 2000
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No, I have never have seen this until this image was proivided, and at Joe McPartland's seminar in the 70's.

The reference in the code seems clear. Is there a problem with the rule, and its application?


Joe Tedesco, NEC Consultant
Joined: Oct 2000
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Would'nt it also apply to every raceway service entrance ?

please explain.

Joined: Jan 2003
Posts: 4,391
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Posted by George

Quote
I don't think concrete should make us believe that the conductors are outside of the house. A drywall wrapping would appear equivalent.

What do you mean, would you not accept this if it went 100 feet?

I would say it would be code compliant.

I agree with Train Wire it would be good to know if that block of concrete is dowelled to the wall or hanging on the die cast connector.

In the installation I was involved with the carpenters supported the concrete


Bob Badger
Construction & Maintenance Electrician
Massachusetts
Joined: Nov 2002
Posts: 558
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I was just curious about how common this was. And how much Joe as an inspector,had dealt with it.I know that I've only seen it done the one time.

Joined: Apr 2002
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I believe one of McPartland’s pictures was of a conduit with 4160V feeding a roof-mounted unit substation. It had been “concrete” encased through the building interior, {maybe for 25 feet} but the “concrete” had been mixed with Vermiculite, so was just about worthless from a mechanical protection standpoint. The recipe for the suspended-in-place concrete had been listed some obscure document, so the inspector had to accept it as installed.

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