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Old 01-23-2013, 03:33 PM   #1
ekjohns
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Default sizing element for 120V 2.5 gal batches

I just got a dedicated 120V 20A source installed in the kitchen, which was the biggest I could go in my rental. I am looking to do 2.5 gal eBIAB recirculating batches and was wondering if someone could give me some advice on element size. Currently I have a 1500W HWD element installed and last night a test run of 4 gal would get a rocking boil with lid on, but with the lid removed it would settle down to a light simmer. Since I have a 20A service with nothing else on the line, I could go up to 2000W (16.7A) which would more than likely give me a super strong boil. The problem I face is I am planning on making a recirculating set up with PID and pump which will all pull amps as well so I would be pushing 20A with everything running and that would exceed the 80% limit for continuous load. The next best option is a 1650W element which will keep me under my 80% limit but only gives me an extra 150W. Does any one known if the extra 150W will give me a strong boil with the lid off? I am not sure how much extra heat 150W really is.

As a side note I have a gas stove so helping the boil along with gas seems unsafe with the wires and rubber so close to the burner. I have also wrapped the pot in one layer of reflex. Would an additional layer help?
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Old 01-23-2013, 05:49 PM   #2
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Im running a 2000 lwd elment in mine along with a sun pump and I have not had any issues running them off the same circuit. I also ran the 1650 and the boil seemed too weak for my liking.
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Old 01-23-2013, 06:16 PM   #3
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Can I ask you what size batch you were doing?
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Old 01-23-2013, 06:53 PM   #4
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Old 01-23-2013, 07:28 PM   #5
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My understanding is that a continuous load is defined as a load where the maximum current will continue for 3 hours or more. Your element will cycle on and off, so this does not constitute a continuous load. If you just keep your amperage draw below 20a, I would expect you to be fine.
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Old 01-23-2013, 07:30 PM   #6
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well it will also be used to boil so off and on for 1 hr then on for 1 hr. Still under the 3 hrs though. I have also read somewhere that the 80% only applies to circuits with multiple outlets but I am not positive on that
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Old 01-23-2013, 09:08 PM   #7
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Have you tried insulating the outside of your kettle?
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Old 01-23-2013, 09:46 PM   #8
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Quote:
Originally Posted by ekjohns View Post
well it will also be used to boil so off and on for 1 hr then on for 1 hr. Still under the 3 hrs though. I have also read somewhere that the 80% only applies to circuits with multiple outlets but I am not positive on that
Only on for an hour if you boil at 100%, but fine regardless.
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Old 01-23-2013, 11:57 PM   #9
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Plenty of people do 2kw and a pump. It'll be fine.
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Old 01-24-2013, 03:41 AM   #10
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2000w and a pump and pid, that is my plan. As above, you'll be fine.
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