The House

blue_mountain - Installing 50 amp outlet in garage for oven

I needed to powder coat some wheels. They would not fit in my toaster oven so I needed something bigger. Ovens are cheap on craigslist. I picked up a working large electric oven for $30. The only problem was that the oven took a 50 amp 220 outlet and all I had in the garage was a 30 amp outlet, which was already claimed by the air compressor.

Thankfully the fuse panel is in the garage right next to where I wanted the outlet. One big problem though, there were no open spaces. There was an existing breaker in every position. Thankfully there was already a 50 amp breaker assigned to the kitchen oven. We have a gas oven. I pulled it out and checked. Sure enough, the wiring is run to where the oven is but they are not terminated in an outlet and they are not used for anything. 

So I disconnected the kitchen oven wiring, taped it off and labeled it, and ran new wiring to a new outlet I installed. I used 6 guage wire. This was overkill given that I was running the wire 6 feet in total. Since I am the home owner I feel that a little extra expense now is justified if it saves me time or money in the long run. 6 guage wire will have less voltage drop and might save me some money. And at 6 feet at $3 a foot, it was not breaking the bank.

I ran all the wire in conduit. The only trick was getting the wire into the fuse panel without tearing up the drywall around it. The top of the box was full. The sides were into studs. So I had to go out the bottom. It runs in the wall for about 6 inches before it leaves the wall, enters a metal box, where it goes through a conduit into another box where it terminates at the outlet. The two metal boxes are secured to studs. The whole thing is very sturdy.

I have run the oven for about 5 hours straight and the cabling, outlet, and conduit all stay room temperature. 

Even though I am using this outlet to run an oven for powder coating, this is the same outlet you would want to use for charging an electric car. I don't plan to get an electric car any time soon but its nice to know I could charge one at 40 amps continuous. The outlet is even placed right by where the charging port is on teslas.

Pictures

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New to me oven. Will be used for powder coating
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Fuse box is full
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Existing 50 amp breaker is not used, will repurpose
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thick red and white are for unused kitchen oven outlet. Will disconnect them
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popped out hole for 6 gauge wire
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yeah, that hole was not big enough in the long run
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hole enlarged to allow me to get wire guide up into hole of fuse box
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6/3 wire, about 7 feet used
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new thick red and black go down to the new outlet
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thick white goes to new outlet
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terminal block on left was full so ground crosses over bottom to right block
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tough bend
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still about 3 feet off ground
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