The standard voltage for most electrical devices is 110-120V, and upgraded voltage powerful electric devices use 220V or 240V. Batteries run at 12V or 24V. Using this equation, we can convert watts directly to amps, if we know the voltage. The higher the wattage, the lower the amps will be for the same amount of watts. Examples:motor or group of motors, but doesn’t have a neutral. The current rating required is the percentage of voltage change. For single phase, if you have to change the voltage by 10% then the rating of the auto-transformer will be 10% of the load rating. The three phase arithmatic is just as easy. A: Clifford A. Popejoy, a licensed electrical contractor in Sacramento, California, replies: Yes, you could replace the two-pole 50-amp breaker with two single-pole breakers and supply two circuits as you intend, but only if you have a four-wire cable running to the stove. You need two supply wires (hot), a return wire (neutral), and a ground wire. From there, run a 12/2 to a standard receptacle for the microwave, and another 12/2 to another receptacle for the refrigerator. Then at the panel swap out the 30 Amp double-pole breaker, and replace with 20 amp breaker. 1.
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2. The wire is usually rated for 600V; check that first if it is and you can find lamps that fit the sockets at 220-240V with the same wattage or less than the maximum wattage. If lamps that fit at the correct wattage are available you could connect the black wire center pin on the fixture to your hot and the white wire to the neutral conductor2yjen.