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Old 10-05-2013, 12:01 AM   #1
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ser subject to physical damage


I am running 4/0, 4/0, 4/0, 2/0 ser. I am coming through the back of the service disconnect mounted on the exterior of my house and into a bedroom.

The cable will be running inside of a 2x4 wall covered with drywall.

Is the cable subject to physical damage? I sorta think that it is because someone could hang a picture on the bedroom wall with a long nail and drive a nail in it.

Well I helped a friend of mine do his last year in the same situation and we ran conduit from where the wire entered the wall up to the attic and the inspector made us remove the conduit. This is a different county, so different inspector. I just don't want to go to the trouble of putting the cable in conduit and the inspector make me remove it.

What do you think? Should I put it in conduit for the 5 feet that it is in the bedroom wall?
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Old 10-05-2013, 06:51 AM   #2
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I am running 4/0, 4/0, 4/0, 2/0 ser. I am coming through the back of the service disconnect mounted on the exterior of my house and into a bedroom.

The cable will be running inside of a 2x4 wall covered with drywall.

Is the cable subject to physical damage? I sorta think that it is because someone could hang a picture on the bedroom wall with a long nail and drive a nail in it.

Well I helped a friend of mine do his last year in the same situation and we ran conduit from where the wire entered the wall up to the attic and the inspector made us remove the conduit. This is a different county, so different inspector. I just don't want to go to the trouble of putting the cable in conduit and the inspector make me remove it.

What do you think? Should I put it in conduit for the 5 feet that it is in the bedroom wall?
There is no way you are going to be able to bend 4/0 SER in a 2x4 wall cavity, The bending radius cannot be more than 5x the diameter of the cable, with that said, no other violation. Other than your disconnect may not be deep enough to make the proper bend when entering from the back side.
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Old 10-05-2013, 06:54 AM   #3
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Well I helped a friend of mine do his last year in the same situation and we ran conduit from where the wire entered the wall up to the attic and the inspector made us remove the conduit.
What code section did he site for removing the conduit?
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Old 10-05-2013, 07:07 AM   #4
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ser subject to physical damage


If you run that SE cable thru an insulated wall, you will be limited to 60 C which will only be rated for 150A.
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Old 10-05-2013, 07:29 AM   #5
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ser subject to physical damage


Conduid and an LB to get inside would be the easiest way and use 4 individual wires.
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Old 10-05-2013, 08:07 AM   #6
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If you run that SE cable thru an insulated wall, you will be limited to 60 C which will only be rated for 150A.
The feeder conductors shall not be required to have an ampacity greater than their service entrance conductors.
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Old 10-05-2013, 08:48 AM   #7
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Just another spot where the code appears to conflict with itself.
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Old 10-05-2013, 09:26 AM   #8
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The ser after the meter is still service entrance conductors.
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Old 10-05-2013, 09:51 AM   #9
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I am coming through the back of the service disconnect mounted on the exterior of my house and into a bedroom.
Feeder...lol

If it was just the meter, he'd be using SEU?
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Old 10-05-2013, 09:55 AM   #10
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You would be correct in that case.
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