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Q: How many amp breaker is needed for 4000 watts at 220 volts?

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There is not enough information to answer your question directly... In order to determine how many volts it takes to make 4000 watts, you also need to know how many amperes there are. That is because watts is volts times amperes. For example, if you had a 120V system, you could divide 4000 watts by 120 volts to get 33 1/3 amperes.

At 120 volts the generator will operate any appliance up to 4000 watts. If your generator has the ability to output 240 volts it will also output up to an maximum of 4000 watts. Amperage wise 120 volts at 4000 watts will equal, I = W/E, Amps = 4000/120 = 33 amps. Likewise 240 volts at 4000 watts will equal I = W/E, Amps = 4000/240 = 16.6 amps.Check the appliances that you would like to plug into the generator for either amperage or wattage. These values will be found on the appliances manufacture's nameplate.

Watt are amps x volts, so to know how many amps 4000 watts are you need to know the volts.

My understanding is that 240 volts x 20 amps = 4800 watts

w is many watts are in 40 amps?

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There is not enough information to answer your question directly... In order to determine how many volts it takes to make 4000 watts, you also need to know how many amperes there are. That is because watts is volts times amperes. For example, if you had a 120V system, you could divide 4000 watts by 120 volts to get 33 1/3 amperes.

At 120 volts the generator will operate any appliance up to 4000 watts. If your generator has the ability to output 240 volts it will also output up to an maximum of 4000 watts. Amperage wise 120 volts at 4000 watts will equal, I = W/E, Amps = 4000/120 = 33 amps. Likewise 240 volts at 4000 watts will equal I = W/E, Amps = 4000/240 = 16.6 amps.Check the appliances that you would like to plug into the generator for either amperage or wattage. These values will be found on the appliances manufacture's nameplate.

Watt are amps x volts, so to know how many amps 4000 watts are you need to know the volts.

My understanding is that 240 volts x 20 amps = 4800 watts

4000 BTU = 1722 watts

about 4800 watt but should not use it 100% so to be safe 4000 watt (80%)

w is many watts are in 40 amps?

For all intents and purposes 4000 watts are equal to 4 KVA.

Amps x volts equals watts...200 amps at 12 volts would be 2400 watts...add a few more because. the inverter efficiency is not 100 percent...

4000 BTU = 1722 watts

There are zero watts for 4000 amps. The formula for watts is; W = A x V, so you see a value for voltage has to be stated to give an answer.

4000 watts on a 240 v system would be 4000/240 amps, 17 amps.

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