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Home Brew Forums > Home Brewing Beer > Electric Brewing > Considering an eHerms 120V build.
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Old 11-27-2013, 06:15 PM   #11
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Check out my 120V HERMs chamber build. I think you'll see big lag issues with a HLT version but this 4 pot brew system works well for me. Sorry I can't figure out how to post a link to it from the app from my phone.


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Old 12-02-2013, 06:43 AM   #12
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Originally Posted by chickens4life View Post
a 2000 watt element is not going to go over the recommended load on a 20A 120V circuit (80% constant use for 3 hours) unless you have it on for 3 hours with out it cycling off. As a side note 20A is standard in kitchens, I have only lived one place that didn't have 20A GFCI for at least one of the circuits..
Older homes don't around here.

You are technically correct about the 80%, the 20 amp circuits can have issues. Why? Because you are not using a dedicated circuit. Those 20 amps are shared with many other plugs, and possibly even a light circuit or more. And most likely a pump or two will be used, and a controller, and they will add more to the load. Also, 120V is not 120V. It's 110 to 120V, nominally 117V. Resistance on heating elements are also not extremely accurate. For all these reasons I chose to use less than 2000 watt devices for 120V circuits.

Some new OTR Microwaves, Freezers, and Fridges now recommend or are required by code to use dedicated circuits, and they all use less power than a 2000 watt element uses.

So the poster using 2000 watt elements should find out what all is on the circuit(s) to be used, and make certain they aren't on.

Originally Posted by chickens4life View Post
As far as ability to boil, if you (which isn't even a concern here, you are using propane for that) as long as you have some time to wait for it to heat up (about 40 min from mashout to boil) 2000 W is enough for an 8 gallon batch, might not work with a wide kettle on a windy day, but you can always brew in side.
He is doing 10-11 gallon batches (= even more water) So we were talking two 20 amp circuits.

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