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Home Brew Forums > Home Brewing Beer > Electric Brewing > Help Wiring 240V Heating Element
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Old 08-14-2012, 12:56 PM   #11
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Originally Posted by Dgonza9 View Post
How large are your batches? A propane burners should give you plenty of power, no? Or was that a typo and you're on a stovetop burner?

I'd be a bit nervous with electrical connections in the vicinity of open flames, no? Maybe I'm wrong as my propane days were a number of years ago, but the potted electrical connections are obviously right up against the keggle. JMO.
I am currently doing 10 gallon batches outside on a two burner single tier stand. I have shifted direction and I'm basically trying to find a way of brewing inside to avoid the insane summer heat. I would be doing 5 gallons batches on either 110V 20A GFI which is already available or 220V 30A which would require installation of spa panel.
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Old 08-15-2012, 01:38 AM   #12
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I have changed direction. My intent is to build a 5 gal batch system (7.5 gal pre boil) BIAB kettle that will work on 120V. I figure I will need 2 120V 2000W heating elements to get this volume to boil. I have 2 GFCI receptacles in my kitchen that are on separate 20A circuits. Since I will be pulling 16.7A per heating element I would like to ensure that everything is rated up to 20A. My GFCI receptacles look like this so I assume this is a 15A GFCI receptacle. There is nothing on the receptacle to indicate what amp it is.



I plan to follow this wiring diagram except I would like individual switches and lights on the heating elements. If someone could help modifying this diagram to have switches and lights I would greatly appreciate it.

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Old 08-15-2012, 01:41 AM   #13
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In my experience a 2000W element will barely boil 5.5 gal. I start with 6.5 then drain off 1.5 and boil it on the stovetop. I'll add this back in the last 10 min or so of the boil...

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Old 08-15-2012, 02:12 AM   #14
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Originally Posted by rack04 View Post
I have changed direction. My intent is to build a 5 gal batch system (7.5 gal pre boil) BIAB kettle that will work on 120V. I figure I will need 2 120V 2000W heating elements to get this volume to boil. I have 2 GFCI receptacles in my kitchen that are on separate 20A circuits. Since I will be pulling 16.7A per heating element I would like to ensure that everything is rated up to 20A.
...

I plan to follow this wiring diagram except I would like individual switches and lights on the heating elements. If someone could help modifying this diagram to have switches and lights I would greatly appreciate it.
...
I drew and posted a diagram today that will probably fit your request:

Electric Brewing Forum: 110v recirculating ebiab 2.5 gallon batches - post #33

I hope it is a good solution for you.

P-J
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Old 08-15-2012, 02:33 AM   #15
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Thanks a lot for the wire diagram. Can anyone tell me if the picture of the GFCI receptacle I posted appears to be 15A. The 20A GFCI receptacles and plugs that I have seen have a different plug orientation, ie on prong is perpendicular to the other.

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Old 08-15-2012, 02:41 AM   #16
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I would agree that those are probably not 20a outlets. And if they're not 20a, your wiring probably only supports 15a, so it won't help to switch just the outlets.

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Old 08-15-2012, 03:11 AM   #17
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I would agree that those are probably not 20a outlets. And if they're not 20a, your wiring probably only supports 15a, so it won't help to switch just the outlets.
The receptacles are connected to 20A breakers so I'm confused. I'll probably take one of the receptacles out and verify if the wiring is 12 gauge or 14 gauge. I may step down to 1500W heating elements to be safe. Anyone know if 2 120V 1500W elements can boil 7.5 gallons?
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Old 08-15-2012, 03:21 AM   #18
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The circuit breaker is 20A - therefore the wire will be 12 gauge. I do not believe you will be at any risk using the system with those GFCI outlets. The only problem I could see is if your refrigerator or another appliance is on the same circuit. That's something easy to check out though.

Just my humble opinion.

P-J

Edit: Here is a 20A outlet layout:



The same plug works with it.

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Old 08-15-2012, 03:24 AM   #19
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Quote:
Originally Posted by P-J View Post
I drew and posted a diagram today that will probably fit your request:

Electric Brewing Forum: 110v recirculating ebiab 2.5 gallon batches - post #33

I hope it is a good solution for you.

P-J
I looks like a great solution. They only thing I don't need in the diagram is the pump. I'm pretty confident I can figure out how to modify the wiring to take this out. How are the resistors wired into the system?

I assume these resisters would work?

http://www.parts-express.com/pe/show...tnumber=003-1K

And these fuses?

http://www.parts-express.com/pe/show...number=070-612

http://www.parts-express.com/pe/show...number=071-818
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Old 08-15-2012, 03:29 AM   #20
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Quote:
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Anyone know if 2 120V 1500W elements can boil 7.5 gallons?
Yes, 3000w will boil 7.5 gal IME...of course not as fast as 5500w, but reasonable.
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