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).]
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.
Re: seu bend radius#58832 11/22/0501:22 PM11/22/0501:22 PM
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.