Originally Posted by
Frank Pratt
This calls for a little math:
First, let's look at the operation at 240V. For a 5000W heater we need to figure out the current and resistance of the element.
To find circuit current: 5000W ÷ 240V = 20.83A
To find element resistance: 240V ÷ 20.83A = 11.52Ω
Now we'll connect that same heater to 120V:
Current: 120V ÷ 11.52Ω = 10.42A
Watts: 120V X 10.42 = 12650.4W
Typo in your last line. Should be =1250.4W
Mike
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