Long time lurker, first time poster. I'm trying to run a sub panel 125' to my newly built shop. I plan on using 2-2-2-4 alum URD in 1 1/4 pvc conduit. My question is my main panel is on a interior wall around 15' from the exterior wall that the feed line will come in at, so can I run the URD in conduit the 15' in the attic to the main panel or do I have to switch to SER ?
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Installing a sub panel
- Thread starter xavier+09
- Start date
URD is not a listed wire type and may not be used. XHHW, RHHW, THWN are all listed wire types and may be used in an NEC installation. XLPE is not. Most of this 'mobile home feeder' is listed, but there is some out there that is not. The stuff the power companies use is not.
If its a listed wire type you can use it in conduit
someone more familiar with the applicable code section can tell you if the conduit has to be sized based on the overall diameter of the cable or if you can size based on the individual conductors since it doesnt have an outer jacket. im not sure.
practically speaking, if you are running 125ft through conduit underground you should consider getting individual conductors. i think pulling 125ft of 4 al conductors twisted together would not be fun. you may want to increase the size of the conduit a bit as well.
If its a listed wire type you can use it in conduit
someone more familiar with the applicable code section can tell you if the conduit has to be sized based on the overall diameter of the cable or if you can size based on the individual conductors since it doesnt have an outer jacket. im not sure.
practically speaking, if you are running 125ft through conduit underground you should consider getting individual conductors. i think pulling 125ft of 4 al conductors twisted together would not be fun. you may want to increase the size of the conduit a bit as well.
Charles (in GA)
Well-known member
Basically, it has to have markings other than or in addition to the URD on it. If URD alone, you cannot enter the building with it.
Break the bank and use 2" conduit, you will be much happier pulling thru it.
Charles
Break the bank and use 2" conduit, you will be much happier pulling thru it.
Charles
Fifteen feet is often not considered "nearest the point of entry" by the AHJ, meaning a separate disconnect is required anyway. If you used an outdoor disconnect you could terminate the URD there, and continue through the attic with a wire type suitable for indoor use.
sberry
Banned
1 1/4 is too small, minimum of 1 1/2 for long run with a couple of turns, 2 inch is even easier.
Aceman
Well-known member
Fifteen feet is often not considered "nearest the point of entry" by the AHJ, meaning a separate disconnect is required anyway. If you used an outdoor disconnect you could terminate the URD there, and continue through the attic with a wire type suitable for indoor use.
He has to run through the house 15' to get to the panel, is what I think he's saying. If he had to run 15' through the building to get to his subpanel, he'd most likely need an outside disconnect.
I also agree with using 2" pvc. Pipe's cheap when you factor in the frustration of trying to pull through a small conduit. Multiconductor cable doesn't pull as easy as individual wires IMO, so it'd definitely be worth it to upsize. Plus the insulation isn't as smooth as THHN THWN so it'll want to drag a little more. Use lube.
green.bubbly
Well-known member
He has to run through the house 15' to get to the panel, is what I think he's saying. If he had to run 15' through the building to get to his subpanel, he'd most likely need an outside disconnect.
I also agree with using 2" pvc. Pipe's cheap when you factor in the frustration of trying to pull through a small conduit. Multiconductor cable doesn't pull as easy as individual wires IMO, so it'd definitely be worth it to upsize. Plus the insulation isn't as smooth as THHN THWN so it'll want to drag a little more. Use lube.
What would be used for lube? I will be pulling some wire through pvc pretty soon.
Gooch
Well-known member
What would be used for lube? I will be pulling some wire through pvc pretty soon.
Wire Pulling Lubricant. Ideal, Greenlee, and 3M makes it.