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Yes, you can but the wattage output rating of the heater will not be reached due to the lower applied voltage. For example if the heater is 5000 watts at 277 volts, the current is I = W/E 5000/277 = 18 amps. The resistance of the heater is R = W/I (squared) = 5000/18 x 18 (324) = 15.43 ohms. Applying 220 volts on the same heater whose resistance is 15.43 ohms results in this new heater wattage rating. W = E (squared)/R = 220 x 220 (48400)/15.43 = 3137 watts. W = watts, I = amperage, R = resistance in ohms and E = voltage.

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Related Questions

Can you run appliances off 220 volts?

Yes, if the appliance was designed to run on 210 to 240 volts.


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What will happen if an electric water heater which is designed for operation at 240 volts is connected to 120 volts?

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Can you use 240 volts for a 208 volt heater?

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Can a 220 volt heating element operate on 110 volts?

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North American household gas dryers run on 120 volts.


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