Electrician Question

[12RingKing]

I am installing a service for my barn. I have URD Syracuse that I'm using for the 100A service about 220' run or so.

That being said, I have the panel inside my barn and had planned on running up to the panel directly with the URD.

I'm reading that that's not the standard with URD cable, however some say it's a matter of interpretation.

Does anyone have specific experience with this? Is it okay to run the URD to feed a service located on the inside of a structure?

Thanks for the help.

[MadHatter]

I am installing a service for my barn. I have URD Syracuse that I'm using for the 100A service about 220' run or so.

That being said, I have the panel inside my barn and had planned on running up to the panel directly with the URD.

I'm reading that that's not the standard with URD cable, however some say it's a matter of interpretation.

Does anyone have specific experience with this? Is it okay to run the URD to feed a service located on the inside of a structure?

Thanks for the help.

Technically no, but there's probably no less than a million structures in Texas, wired that way.
Put a little Penetrox or othe anti-ox on it, and you're good.

[12RingKing]

Technically no, but there's probably no less than a million structures in Texas, wired that way.
Put a little Penetrox or othe anti-ox on it, and you're good.

I’m familiar with needing the penetrox on the lugs for aluminum, and I appreciate the heads up on that too. There are lots of people who forget that step.

Thank you for your input as well.

[miket]

I struggled with the same thing when building my shop. 2 runs of 200amps ( machine shop ) over 200' was too expensive with copper. Ended up running URD to a junction box on outside wall and splicing to copper to go inside shop. For me it killed 2 birds with one stone. The 350mcm alu wire was too big to fit the lugs in the 200a box anyway.

On edit, not an electrician.

[tex4k]

I can tell you from non-electrician experience, make sure your wire is rated to handle those little extra load surges, ran about 100' of aluminum to a barn that 100 amp running a welder and other items over the years it got to where it was tripping breakers and other problems, got bad enough I finally bit the bullet and went with copper, that fixed the problems.

[FLASH_OUTDOORS]

Sleeve it with a piece of sch. 80 pvc and be done. Also that wire isn’t rated to be encased in concrete. Do sleeve it thru the slab as well


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[FLASH_OUTDOORS]

Also what size are you running for 100a. Also need a separate ground wire for a sub panel


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[12RingKing]

Also what size are you running for 100a. Also need a separate ground wire for a sub panel


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I’m running Syracuse URD. It’s 2/0,2/0,2/0,1 quadruplex.

We are running a 100a service to my barn. We are running it from a 200a feed through panel where my service is installed and it’s about 215’ run total. I had a 320a service installed for my home, barn, and possibly a future guest home.

[12RingKing]

I struggled with the same thing when building my shop. 2 runs of 200amps ( machine shop ) over 200' was too expensive with copper. Ended up running URD to a junction box on outside wall and splicing to copper to go inside shop. For me it killed 2 birds with one stone. The 350mcm alu wire was too big to fit the lugs in the 200a box anyway.

On edit, not an electrician.

This is what people are claiming I need to do, basically claiming URD can’t enter a structure.

However, I would rather not if I can get away with it safely.

[Mike D]

I’m running Syracuse URD. It’s 2/0,2/0,2/0,1 quadruplex.



We are running a 100a service to my barn. We are running it from a 200a feed through panel where my service is installed and it’s about 215’ run total. I had a 320a service installed for my home, barn, and possibly a future guest home.

You said feed through panel, are you not feeding the shop with a breaker?


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[FLASH_OUTDOORS]

Electrician Question

You said feed through panel, are you not feeding the shop with a breaker?


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Mike is right. If you come off the feedthru panel to the 100 amp panel in the shop, the main will be 200a. You will need to change the main in the feedthru to 100a. Or run 250kcmil to the shop. And leave 200main


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[12RingKing]

I’m using a 100a breaker. The feed through would be for a separate building at some point, maybe.

[FLASH_OUTDOORS]

Electrician Question

I’m using a 100a breaker. The feed through would be for a separate building at some point, maybe.

You will have a difficult time terminating the 2/0 on that 100a 2pole breaker. Look on the breaker it will tell you the max wire for that lug. You could use some 2hole inline Polaris taps in the panel and step down to a smaller gauge copper wire to terminate on the 100a breaker.


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[12RingKing]

You will have a difficult time terminating the 2/0 on that 100a 2pole breaker. Look on the breaker it will tell you the max wire for that lug. You could use some 2hole inline Polaris taps in the panel and step down to a smaller gauge copper wire to terminate on the 100a breaker.


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Schneider electric claims it’ll fit a 2/0 aluminum conductor in this breaker. I’m sure it may be a little snug though, but I’ve never had issues with them misrepresenting sizes before.

[12RingKing]

So the consensus would be that if I put it in conduit that I’m okay for the entrance to a panel inside a barn?

Panel is located on the inside of an exterior wall, so it would not have much exposure inside the building.