sub-panel wire size
#1
08-11-09, 07:18 AM
Join Date: Aug 2009
Location: MN
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sub-panel wire size
Hi all,
I recently had my electrical service upgraded to 200A, as I've added a second floor addition. In the interest of not having to run a bunch of wires from the space of the new addition down through the walls and into the basement service panel, I plan to add a 100A sub-panel in the addition that will be fed from the main panel. I'm curious what size wire you would suggest feed the sub-panel. The distance between the two panel will approx. 15-feet.
Thanks!
I recently had my electrical service upgraded to 200A, as I've added a second floor addition. In the interest of not having to run a bunch of wires from the space of the new addition down through the walls and into the basement service panel, I plan to add a 100A sub-panel in the addition that will be fed from the main panel. I'm curious what size wire you would suggest feed the sub-panel. The distance between the two panel will approx. 15-feet.
Thanks!
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#4
08-11-09, 09:11 AM
Through conduit I would recommend copper THHN wire in #3 for the hots and neutral and #8 green or bare for the ground. The minimum size conduit you can use for these wires is 1", however 1-1/4" will probably be better if there are any bends or LB fittings to pull through.
Do you have a good subpanel location? Clearance can sometimes be tough to get in a second floor.
Do you have a good subpanel location? Clearance can sometimes be tough to get in a second floor.
#5
08-11-09, 09:50 AM
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Thanks for the suggestion As far as location of the sub-panel, I have plenty of options thankfully. The house addition I had built is a shell-only, so I'll be doing all the interior/finishing work. Therefore, the walls are currently open and 2x6 construction which leaves many location options. I will likely need an LB fitting, so 1.25" conduit may be the better choice for ease/convenience.
Thanks again!
Thanks again!
#7
08-11-09, 07:14 PM
Originally Posted by H8Mondays
As far as location of the sub-panel, I have plenty of options thankfully.
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