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240V planning - can you verify my logic

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mattnday

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I want to run a 50 amp 240V circuit to my garage for brewing.

My service panel is exactly on the other side of the wall from where I will be brewing so wire run will be short. 3-4 feet

I know I will need a 4 wire setup so I can run both 120V and 240V at the same time. I am going to most likely purchase a pre-made controller like a Brumatic or a high gravity controller.

I have a Cutler Hammer BR series service panel and have significant extra load as it is a 200 amp panel.

My though is to purchase a 50amp GFCI for the panel

http://www.amazon.com/Cutler-Hammer-GFCB250-Circuit-Breaker/dp/B007UOKXIS

I would use 10/4 wire to wire up a 4 wire dryer plug inside the garage

http://www.amazon.com/Leviton-279-Receptacle-Industrial-Grounding/dp/B00009W3AA/ref=sr_1_1?ie=UTF8&qid=1413040068&sr=8-1&keywords=50+amp+4+wire+outlet

If I did my research correctly I would be good to go to use either one or 2 5500w elements at this point and could also run a 110 outlet to service my pumps.
 
Last edited by a moderator:
You're close. 10/4 isn't big enough wire for a 50A circuit. Off the top of my heads, I think you need #6 copper or #4 aluminum. (there's nothing wrong with AL wiring once you get over 30A) For something that short, I would go with copper.
 
You're close. 10/4 isn't big enough wire for a 50A circuit. Off the top of my heads, I think you need #6 copper or #4 aluminum. (there's nothing wrong with AL wiring once you get over 30A) For something that short, I would go with copper.


If you use AL, use the anti ox when making the connections.

You should be able to find 6-3 w/ground NM-B at any large box store. Go to a main lug load center and break down to your 120/240 circuits there.
 
For the same price you can get a gfci spa subpanel, from home depot. You'll still need a 240v 50a breaker at the main panel, maybe $15 more. Having a subpanel makes it easier to kill power to your setup and not have to go back to the main panel. Plus it would be easy to add more circuits if needed.
 
If you can snag that used one for $58 then that's how I'd do it. If you end up buying new, it will be over $100 and then I agree that the spa panel would be the cheaper way to get GFCI.
 
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