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Wire pull to detached garage (Houston)

DB2

Well-known member
Joined
Jan 2, 2009
Messages
57
Location
Houston, Texas
Folks -

I've been lurking here for a while, getting ready to build a 26 x 26 detached garage at my house in Houston.

My house is a small 100 yr old bungalow. I recently replaced all the original knob & tube wiring (!) and had a new 200 amp service panel with a new drop from the street installed.

The service panel, like almost all in Houston, is on the outside of the house, in this case up at the front left corner. The garage will be detached from the house and located in the rear right corner of the lot. There will be approximately 12 feet of open space between the garage and the house. I would like to put a 100 amp sub panel in the garage.

What would be the best way to run the power from the service panel to the sub panel, and across the open area? The house has a 3 foot crawl space. Can the wire to the sub panel be attached to the underside of the house (in conduit, obviously) and then into a trench across the open area, or would it have to buried the entire way? If so, can it be buried under the house or does it have to be outside of the house? I'll probably get a pro to do the work, but want to make sure I'm doing the most economical route.
 
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mrb

Well-known member
Joined
Dec 31, 2008
Messages
3,734
just. make. sure. you get the right wire. most of the 'triplex' 'quad' 'mobile home feeder' etc is not a listed wire type and cannot enter the structure. If anyone tells you otherwise, theyre full of it (unless the wire is also marked XHW or something -XLPE is not a listed wire type). If you hear 'we've been doing it like this for 10 years' RUN. Most likely you are under 2008 NEC now and will need to run 4 wires, not 3, to your detached garage.
 
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Fiberglass Fred

Well-known member
Joined
Feb 5, 2009
Messages
46
Location
Texas
Under craw space, and then under ground for the 12' span should be okay. And mrb is correct in assuming that Houston is under current NEC.
 
OP
D

DB2

Well-known member
Joined
Jan 2, 2009
Messages
57
Location
Houston, Texas
Thanks guys. So, from what I understand, I would need 3 x #4 copper + 1 x #8 copper (for the ground).

What insulation type should be used?
 
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