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-   -   Wiring a garage (http://www.diychatroom.com/f18/wiring-garage-30006/)

reverendcolin 10-15-2008 03:30 PM

Wiring a garage
 
I put up a small garage next to the house. It's 20 X 20. I want to run a 55 or 60 amp service from my house (the mobile mansion) which has a 100 amp service to the garage.

Need to know, if this is correct.
I have 10-2 running from the house to the garage and will run 12-2 for everything in the garage.

Which includes:
*a hot air oil furnace 20amp breaker
*2 lines of recepiticals 4 double units each. 20 amp breaker each. I'll have GFI on both of these
*lighting, two 8 ft florescence plus a ceiling box for later. 15 amp breaker
*garage door opener and ceiling fan. 15 amp breaker

I want to run a 60 amp breaker off the 100 amp panel in the house and a 55 amp breaker in the garage panel.

I would like to set it up so I can add a 240 outlet at a later date for an air compressor or welder.

Tell me everything I'm doing wrong.:)

jbfan 10-15-2008 04:39 PM

Using a 10/2 and hoping to put a 240 welder out there is one. Hoponf to put a 60 amp breaker to support the 10/2 is another.
Shall I go on?

You need 3 #6 thhn/thwn and a #10 ground wir, and this needs to be run in conduit. You will need a ground rod at the building, and a disconnecting means.

These are the basics.

reverendcolin 10-15-2008 05:32 PM

That's a start and should be easy enough to change. I've got the conduit in the ground and just ran the 10-2.

What could I use, forgetting the welder and 220? I have that already in another out building.

BTW it would be a 60 amp breaker in the house panel and a 50 amp in the garage. or should I run 50's on both sides?


The distant's from the garage panel to the house panel is under 40 foot.
I figured on the ground rod maybe too. It's a meta; building

gp_wa 10-15-2008 05:36 PM

You need to maintain neutral/ground separation from the main panel out. That means you need 3 conductor cable plus a ground, and a separate ground bar kit in the sub panel. Your cable needs to be rated for underground conduit; that's why jbfan mentioned "thhn/thwn" (those are insulation ratings).

reverendcolin 10-15-2008 06:04 PM

Okay, Thanks to all....

Now I'm thinking I'm just run a 30 amp from the house to the garage panel. I have my compressor in another out building that's set up for 220 (240) already and I can weld in there too.

This will be used as more of my man cave, to store the old SLK and build a cafe racer.

So... From what I've gathered, the 10-2 will work ... running a 30 amp on both panels. Am I right?

gp_wa 10-15-2008 06:09 PM

10-2 with ground?

Is the cable rated for underground conduit?

Are you sure you want to limit yourself to 110 volt in the garage?

Is this about the cost of replacing the cable? Have you looked into aluminum service entry cable?

reverendcolin 10-15-2008 06:19 PM

Yes 10-2 with ground. It's rated for underground and it's completely in PCV conduit.

It's more about time (and money too) I have a 50 amp panel in the garage so the 30 amp will work for this year. If I decided to up grade it's an easy run for the wire.
As long as I have heat, light,music and can use some small power tools it won't be a problem. The other out building with the compressor is close enough to run a hose if needed or I can run insulated black pipe to the garage.

jbfan 10-16-2008 06:20 AM

With 10/2 you are limited to a 120v service at 30 amps. You can not get 240v out of this set up.

reverendcolin 10-16-2008 06:52 AM

Quote:

Originally Posted by jbfan (Post 172882)
With 10/2 you are limited to a 120v service at 30 amps. You can not get 240v out of this set up.

Yes I know but I think that will have to do for this year. It's a short run and I can up grade it next year, if need be. I think I was "going for the gold" on my original plan. May not need the extras.

Will this 30 amp be enough for the set up I plan.

Quote:

*a hot air oil furnace 20amp breaker
*2 lines of recepiticals 4 double units each. 20 amp breaker each. I'll have GFI on both of these
*lighting, two 8 ft florescence plus a ceiling box for later. 15 amp breaker
*garage door opener and ceiling fan. 15 amp breaker
Thanks again for your help.:thumbsup:

jbfan 10-16-2008 07:00 AM

That may be pushing it to limit. It all depends on what you are plugging into the outlets.

reverendcolin 10-16-2008 07:43 AM

Quote:

Originally Posted by jbfan (Post 172891)
That may be pushing it to limit. It all depends on what you are plugging into the outlets.

Small tools, drill, saws things of that nature. stereo, TV, laptop. I sell a lot of stuff on line,motorcycle, hot rod, antique car stuff. I will be using the garage for listing and shipping items too.

I have the drill press, bead blaster and the bigger stuff in the other out building

reverendcolin 10-16-2008 07:46 AM

BTW, herre's some pictures of the garage. Yes it's a mess because I have several projects going at the same time. Should have all done by the end of this month.

http://s151.photobucket.com/albums/s...dcolin/Garage/

handyman78 10-16-2008 11:51 AM

What size pvc conduit do you have to this building?

reverendcolin 10-16-2008 12:26 PM

Quote:

Originally Posted by handyman78 (Post 172966)
What size pvc conduit do you have to this building?

1 inch pcv conduit.

reverendcolin 10-18-2008 06:47 PM

You guys never told me "all circuit breakers are not the same".

I find I have a wadsworth panel. I brought a couple 30/30 amp breakers (one for the main box in the house and one for the panel in the garage) at Home Depot. Noticed they don't fit.

Found a Wadsworth 30/30 double pole (is that right) on ebay, ordered it.

I'll take some pictures of both boxes later and maybe you can give me some pointers as to what I may need.

I've put a 48 inch rebar in the ground and need to know what gauge I run to the ground.

The panel I have had a 50/50 amp breaker in it. Is this panel okay to use?

When I picked it up it had a bunch of 15 and 20amp single poles that I believe I can use.


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