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Most household voltages range from 110 to 120 volts. All equipment rated within the ranges from 110 to 120 volts are all compatible with each other. This ten volt range is brought about by the power company, as they have a responsibility to keep voltages within a certain 10% range. The load will only notice a difference of 1% on the load current. e.g. Wattage load of 2400. Amps = watts/volts. 2400/110V = 21 amps. 2400/120V = 20 amps.

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