Subpanel

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guschash

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Ohio
I have a pole barn that is 100 x 50 that has 100amp main panel. There is wall down the center. The panel is full I can't use mini's. So I want to put a subpanel. Do I need run 4 or 3 wires. I like to make it 240V.
 
If the existing panel is single phase, 3 wire (120/240) you would need to separate the grounded and grounding conductors. You could use 3 wires if you had a metallic raceway between the two panels to serve as the EGC.
 
Towzzer said:
infinity i was curious, could a offset nipple count as a ground
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Yes, it would qualify as an EGC. You could still install a wire EGC within the nipple if you like.
 
Help a city boy out here. Do pole barns normally have there own service?
Seems like the 100A panel would already be a sub panel.:-?
 
Dave58er said:
Help a city boy out here. Do pole barns normally have there own service?
Seems like the 100A panel would already be a sub panel.:-?
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Eh, kinda depends. If a person has a business in a pole barn, and it is not part of a homestead or farmstead, it will have its own service. If it is on a homestead, it will most often be fed from the house. If it is on a farmstead, it will be fed from the CD pole.
 
Some do some don't, If it is close to a service supply yes it will be fed as a sub panel.

Then again some pole barns require a service because they are loacted far away from any buildings and services that could reasonably feed them .
 
Jim, If I want to feed a sub panel underground 100 ft from my service panel to my pole shed with a 100 amp feed what does the power company have to do with anything ???
 
I don't believe that its a Florida thing here . The utility supplys the service conductors to the service panel just like anywheres else, beyond that is not in their scope of operations.

Anymore different please lets here .
 
I wrote that in haste and would like to correct what i meant to say .

The utility supplys the service conductors to the line side of the meter , the load side service conductors supply the service panel disconnect.

What I meant to say they ( the utility ) have no resposibility or concerns after this point.
 
What does the utility, service vs. subpanel have to do with the OP? There is a panel in the barn, he wants to add another. Why does it matter what the original barn panel is?
 
infinity said:
What does the utility, service vs. subpanel have to do with the OP? There is a panel in the barn, he wants to add another. Why does it matter what the original barn panel is?
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In regards to the original post it does not matter, Jim was the one saying that the power company needs to get involved and I wonder why also ??

Dave58er asked if a question if most pole barns have their own service , again that would depend on how far its from the main service, around where I live that pole barn could be a 1/2 mile away, maybe more and it would need its own service.
 
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