Aptos, CA, USA
I'm trying to determine how much power my electric oven is using (as part of a larger project to possibly upgrade our electrical service (with help from a licensed electrician of course).
When I check the sticker on the side, it has the following info:
VOLT KW HERTZ
---- --- ------
120/208 2.60 60
120/240 3.40
The circuit going to it is dedicated from the breaker box and the breaker itself is rated for 60 amps (two 30 amps connected together).
How do I know which line item applies to me?
Best Answer
Assuming you have the split-phase power supply that is normal for residential settings in the United States, you should use the line item for 120/240V.
The 120/208V line is for 3-phase supplies, which you typically find in commercial or industrial settings (each leg of a 3-phase supply is 120V relative to the neutral, and is at a 120° phase difference to each of the other legs, so the voltage between them is 120V * sqrt(3) = 208V).