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seu bend radius #58830
11/21/05 08:23 PM
11/21/05 08:23 PM
kdal  Offline OP
Joined: Sep 2005
Posts: 34
Hello everyone
Posted SEU meant SER
I have a few questions regarding service entrance cable.
Is it possible to come from the meter can through the wall and up without violating the bend radius. The walls are framed with 2 x 4’s.
The actual diameter of the conductors in 4/0 aluminum SE cable appears to be aprox. 5/8 to 3/4 an inch. 3/4 x 5 = 3 and 3/4 inch bending radius.
Also this puts the cable very close to the finished surface. Wouldn’t this require nail plates?
I have seen this done many times and always passed inspection. I am interested in doing things proper, not just passing inspection.

[This message has been edited by kdal (edited 11-22-2005).]

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Re: seu bend radius #58831
11/22/05 01:13 PM
11/22/05 01:13 PM
gfretwell  Offline

Joined: Jul 2004
Posts: 9,184
The only place the code requires the 1.25" setback is next to framing members.
I don't like it, or even agree but that is the way it reads and the way it gets enforced here.
A agree with your concern on service entrance conductors. I would probably go after that with 250.30(A)(1)
<service disconnect shall be>... "nearest the point of entrance of the service conductors." and tell them the "up" has to happen outside the building with the penetration right behind the service disconnect.

Greg Fretwell
Re: seu bend radius #58832
11/22/05 01:22 PM
11/22/05 01:22 PM
macmikeman  Offline
Joined: Jul 2002
Posts: 717
Honolulu, Hawaii
We have a couple of inspectors that won't allow that method on 2x4 construction walls for anything bigger than #2 ser. The minimum bending radius for Ser cable is based on the outside dimensions of the cable, not the conductors. With 4/0 cable you won't be able to make a small enough bend to meet code and stay inside the wall at the same time. See 338.24.


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