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Posted by Harry on December 15, 2006, 7:35 pm
Hello,
How do you run a wire from the house to the barn for electricity?
I want it to go underground. So far the trench had to be dug 18"
deep (that much i know (legal stuff)).
Is there a wire that can be used or do you have to use conduit?
If you can use a wire, can you run the part that is in the house
with normal wire and at the outside point change to outside wire?
Are there special connection for this change? Is the outside wire
a great deal more expensive, as i suspect?
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Posted by RBM on December 15, 2006, 7:49 pm
There is "UF" cable, which is direct burial. You would use NM or AC
(standard cable), in the house and transition to the UF in a junction box,
using wire nuts, before going outside or underground. You need to check on
the buried depths for your particular circumstances, as it may require a
trench of 24 inches. UF cable is more expensive than NM cable but probably
less expensive in the labor involved in doing the job in conduit
> Hello,
>
> How do you run a wire from the house to the barn for electricity?
> I want it to go underground. So far the trench had to be dug 18"
> deep (that much i know (legal stuff)).
> Is there a wire that can be used or do you have to use conduit?
> If you can use a wire, can you run the part that is in the house
> with normal wire and at the outside point change to outside wire?
> Are there special connection for this change? Is the outside wire
> a great deal more expensive, as i suspect?
>
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Posted by Colbyt on December 15, 2006, 7:51 pm
> Hello,
>
> How do you run a wire from the house to the barn for electricity?
> I want it to go underground. So far the trench had to be dug 18"
> deep (that much i know (legal stuff)).
> Is there a wire that can be used or do you have to use conduit?
> If you can use a wire, can you run the part that is in the house
> with normal wire and at the outside point change to outside wire?
> Are there special connection for this change? Is the outside wire
> a great deal more expensive, as i suspect?
>
UF (underground feeder) wire is okay if buried to the proper depth for your
local code. Based on the length of the run and the load demand you may need
to step up the wire size for the given ampacity because of voltage drop.
The only advantage to conduit is additional protection in rocky ground and
the ability to replace the wire with no digging at some point in the future.
Considering the current price of copper cable, conduit and wire might be
cheaper.
Colbyt
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Posted by on December 16, 2006, 7:04 am
On Fri, 15 Dec 2006 19:51:52 -0500, "Colbyt"
>
>> Hello,
>>
>> How do you run a wire from the house to the barn for electricity?
>> I want it to go underground. So far the trench had to be dug 18"
>> deep (that much i know (legal stuff)).
>> Is there a wire that can be used or do you have to use conduit?
>> If you can use a wire, can you run the part that is in the house
>> with normal wire and at the outside point change to outside wire?
>> Are there special connection for this change? Is the outside wire
>> a great deal more expensive, as i suspect?
>>
>
>UF (underground feeder) wire is okay if buried to the proper depth for your
>local code. Based on the length of the run and the load demand you may need
>to step up the wire size for the given ampacity because of voltage drop.
>
>The only advantage to conduit is additional protection in rocky ground and
>the ability to replace the wire with no digging at some point in the future.
>
>Considering the current price of copper cable, conduit and wire might be
>cheaper.
>
>
>Colbyt
>
I just did this on my new barn. On end of it is only about 15 feet
from my garage. I hit lots of rocks, and have a mole problem, so I
decided that conduit was required, and besides that, the trench dont
need to be as deep, and digging is the hardest part of the job (by
hand). I just used that gray pvc conduit, I used 3/4" to allow for
expansion. I ran TWO 20A circuits from the garage. I probably could
have done fine with one, but what the heck, 2 is better. I am already
glad I did because I keep horses in there and sometimes use 1000watt
water trough heaters. Last week I had 2 of them going and turned on a
electric space heater in my little entry way so I could warm up while
working in there. I'm glad I had 2 circuits. I got these two 20A
breakers on opposite sides it the line so I can share the neutral.
Then, for the heck of it, I shoved an extra #14 wire and a #14
neutral. That's not connected, but it's there if I want to expand.
In summer I might run a 15A breaker to that for my lighting only.
I dont know the size or use of your barn, but I'd recommend at least 2
circuits. Of course that means using a 12-3 UF (costly). So, consider
pvc conduit. In the end it cost less than UF. I am really not sure
what the code says these days for pvc conduit burial depth, but it's
much less than UF, allows for expansion without digging again, and is
more durable if you got digging critters. I actually paid less per
foot for conduit than for UF, and I already had the wire to shove thru
it. I placed my conduit 8 to 10 inches deep. I was hitting lots of
rock at 8" so thats where I stopped. But on the garage end there was
no rock so I got carried away digging. plus I had to tunnel under the
wall footing, which is a cement block set in the soil with the slab
poured on top. (It was built this way because of lower soil on one
end and to stop or slow down those damn critters that dig under slabs.
So, at the actual garage wall, I went down over 12". An 8" block and
4" slab.
Now, if I want to add anothe circuit, or run something like a phone
wire to the barn, I got the conduit there and dont have to dig again.
(It's probably not legal to run a phone line thru conduit that
contains AC power wires, so you did not read that part.....)
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Posted by Bob on December 16, 2006, 7:59 am
Hello,
How do you run a wire from the house to the barn for electricity?
I want it to go underground. So far the trench had to be dug 18"
deep (that much i know (legal stuff)).
Is there a wire that can be used or do you have to use conduit?
***********************************************************
A few years ago I ran 220V power to a garage I built 150 feet from the
house. I used #4 copper stranded wire and ran it through 2 inch pvc, in
which I sealed all joints just as if it were going to carry water.
Another thought: I used the same ditch to run a 3/4 inch pvc for water and
ran a phone cable as well. Phone company gave me the underground wire they
use.
All works fine.
Bob
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