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Home Brew Forums > Home Brewing Beer > Electric Brewing > Running 240 with 120
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Old 02-18-2013, 10:31 AM   #1
agezzi
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Default Running 240 with 120

What is the break down on running 240v element on 120v. I know you can, but what is the the break down. Like what would a 3500w 240v element put out watt wise on 120v.


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Old 02-18-2013, 10:36 AM   #2
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1750w


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Old 02-18-2013, 10:41 AM   #3
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So it just cuts it in half? I have seen a thread before on the break down. But I can't find it.
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Old 02-18-2013, 11:41 AM   #4
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Wait... Wait..

An element rated for 240V and powered by 120V delivers 1/4 the wattage.
The 3500W 240V element powered with 120V delivers 875W.
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Old 02-18-2013, 02:40 PM   #5
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The entire commonly available series of 240V elements breaks down like this:

6000 Watt on 240V = 1500 Watt on 120V
5500 Watt on 240V = 1375 Watt on 120V
4500 Watt on 240V = 1125 Watt on 120V
3500 Watt on 240V = 875 Watt on 120V
2000 Watt on 240V = 500 Watt on 120V
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Old 02-18-2013, 02:59 PM   #6
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It is probably too pricey but is it feasable to use a step-up transformer to power the 240V elements using standard 120V/20A power?

This would solve the impedence mismatch and you would get all the power from the 240V element.
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Old 02-18-2013, 03:19 PM   #7
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Transformers that size cost silly money. And you'd still be limited to the current rating on the 120V circuit.
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Old 02-18-2013, 03:42 PM   #8
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Probably better to run a second 110 element
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Old 02-18-2013, 04:00 PM   #9
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Can you move your neutral on that outlet to another breaker? If you can u now have 240.
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Old 02-18-2013, 04:39 PM   #10
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Quote:
Originally Posted by helibrewer View Post
It is probably too pricey but is it feasable to use a step-up transformer to power the 240V elements using standard 120V/20A power?

This would solve the impedence mismatch and you would get all the power from the 240V element.
To step-up to 240v 30A you would need 120V 60A. You can only get 240V 10A from a 120V 20A circuit.


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