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Old 01-07-2012, 03:15 PM   #1
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Garage 220 Outlet For Heater


My neighbor wants to install a 220 outlet(probably 30A) in his garage to provide power for a heater(not yet purchased) for when us neighbors get together in the winter.(No problem with beer staying cold though)

His main panel is recessed in one of the walls in the garage. He wants to install the outlet about 3 feet away from the lower right corner of the panel.

Wall where panel is recessed in has drywall on it.
Panel has its metal covering which can be removed and the drywall is up to the metal covering.
He has plenty of room in panel for a 30A breaker

A.would it be easier to flush mount or surface mount an outlet?
B.what type of boxes(to house the outlet) would you use for each install?
C.if he surface mounted how would physical protection be provided for cable as it would have to eventually exit the drywall to enter the box?

If the panel was not recessed things would be easier, would just run some armored cable or EMT and from panel to surface mounted box but fact that panel is recessed is throwing in monkey wrench.


Last edited by Minus08; 01-07-2012 at 03:21 PM.
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Old 01-07-2012, 03:27 PM   #2
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Garage 220 Outlet For Heater


First no need for an outlet just hard-wire it, second you can use bx on the outside of the sheetrock if you don't mind it looking like hack work. further more in my opinion you can put rommex also on the outside of the Sheetrock but we will definitely have people that disagree.

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Old 01-07-2012, 03:31 PM   #3
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Wait until you have settled on which heater will be used before making rough in choices.
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Old 01-07-2012, 03:43 PM   #4
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Garage 220 Outlet For Heater


I believe the heater he is looking at comes with a cord
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Old 01-07-2012, 03:45 PM   #5
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Quote:
Originally Posted by Minus08 View Post
I believe the heater he is looking at comes with a cord
OK. When you're sure... you can get a receptacle to match that.
And then know what size/type wire you need to use.

hth
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Old 01-07-2012, 04:59 PM   #6
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Garage 220 Outlet For Heater


Do yourself a favour and buy a proper unit heater!! Don't want to burn down your garage. And hardwired for sure!
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Old 01-07-2012, 08:50 PM   #7
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Do yourself a favour and buy a proper unit heater!! Don't want to burn down your garage. And hardwired for sure!

Is that a Fahrenheat heater? I suggested bringing the old electric dryer into the garage and just leaving the door open. Suggestion given after many beers.

Anyway if we surface mount a junction box to hardwire a unit how does the cable transition from the panel to the outside surface of the drywall to be able to get inside the J-box.

Or should the cable be run up a stud on the interior of the wall and brought into the backside of the j-box?
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Old 01-07-2012, 08:53 PM   #8
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Garage 220 Outlet For Heater


Cables can enter the back of junction boxes. This way no surface wiring is involved.
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Old 01-07-2012, 09:10 PM   #9
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Garage 220 Outlet For Heater


Is it insulated? What is the square footage of the garage? What's the location of the garage?(geographically) Size and probably type of heater will depend on a few variables. After the heater is purchased then all the answers given will most likely be accurate...before that it's all speculation.
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Old 01-07-2012, 09:45 PM   #10
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Garage 220 Outlet For Heater


Minus,
Why don't you just cut out a piece of the drywall, run your wiring in the wall, mount your box inside the wall, then put the piece of drywall back and tape it. Sounds like you guys have enough beer to manage that, no big deal.
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Old 01-08-2012, 01:12 AM   #11
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Garage 220 Outlet For Heater


It's cleaner to run the wiring in the wall, and you can use NM cable instead of conduit if you do that. Just come out the top of the panel and run up the wall in that same study bay. You should be able to fish the cable fairly easily. Mount a pull-out disconnect on the wall near the heater location, and run the wire in through the back. Run flexible conduit from the disconnect to the heater. That's how I'd do it.
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Old 01-09-2012, 12:46 AM   #12
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Garage 220 Outlet For Heater


The heater he is getting is to be hardwired and the manual says use #10 wire. Forget what i said in 1st post about having outlet about 3 feet away from the lower right corner of the panel.

The first photo shows the panel with the cover removed, also removed is a small piece of wood like 2ft x 1.5ft that was just nailed up from the top of the panel to right above the cut line on the drywall. The second photo is a close up of the panel.


We'll cut in an old work box several feet above the panel maybe one stud bay to the left, run 10-3 cable to this j-box. Now what type of cover goes on the j-box so that we can run our greenfield from the j-box to the heater?

Last edited by Minus08; 03-04-2013 at 11:06 AM.
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Old 01-09-2012, 01:15 AM   #13
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Garage 220 Outlet For Heater


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Originally Posted by Minus08 View Post
Now what type of cover goes on the j-box so that we can run our greenfield from the j-box to the heater?
Square cover with the center knockout.
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Old 01-09-2012, 06:40 AM   #14
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Garage 220 Outlet For Heater


I don't see any spare breakers.
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Old 01-09-2012, 08:23 AM   #15
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Garage 220 Outlet For Heater


Extending on what jbfan said...
is there a chance that the electric clothes dryer is in the garage?
or some other high amperage appliance that already has 240V service where you need it?

hth

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