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How many watts can be plugged on 12-2 cable on 240V with a double breaker?


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2015-07-15 19:10:30
2015-07-15 19:10:30

A #12 cable is rated at 20 amps however only 16 amps can be connected to this cable.

wattage = amperage x voltage

1920 watts = 16 x 120 (each leg)


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As more items are plugged into a circuit the resistance of the circuit rises. This is the same formula that you use for resistances in parallel. As each item is plugged into the circuit its resistance rises causing the current of the circuit to become higher. The breaker is in the circuit to protect the wire from overloading with the higher current . When an over limit of items are plugged in, the breaker trips, cutting off the current to the circuit. A usual limit to a 15 amp circuit is 12 amps or 1440 watts. The breaker will trip at 15 amps or 1800 watts.

Watts is the product of amps times volts. If you are asking how many watts can be put on a 15 amp circuit breaker then 15 x 120 = 1800. This will probably trip the breaker because it is close to the breaker threshold. So lets say 1600 watts.

The connected load in watts to a single pole 30 amp breaker is calculated by the following equation. W = I x E. Watts = Amps x Volts. A higher wattage than what you calculate will trip the breaker.Also another equation you should be familiar with, for breaker sizing if only the wattage is given on the nameplate, is that for amperage from watts. I = W/E. Amps = Watts/ Volts.

The maximum wattage that a 30 amp breaker can handle is 30 x 230 = 6900 watts. Other variables come into play and this number will decrease depending on the load, duty time, and difference in voltage fluctuation.

To answer this question the voltage of the circuit from the 30 amp breaker must be given.

Yes. watts / volts = amps. 4800/240=20amps.

Watts are a measure of power, so double the watts and you have double the power.

Should be fine if that is all that is on the breaker.

Not a whole lot. Assuming that is 120 volt power, 1200 watts would be 10 amps. A standard breaker is 15 amps.

Wattage (power) is not stored in a breaker; in its tripped position, electrical power form the power line is disconnected. When the breaker is activated, electricity (power) flows through the breaker to the circuit in the home. Using the formula below, you can find the wattage the breaker can handle, not how much it has. Watts = Volts x Amps = 120 volts x 15 amps = 1800 watts A toaster requires 1500 watts of power, so if you are running a coffee maker which probably requires 700 watts or more and turn on you toaster, that 15 amp breaker will trip.

At 120 volts a 15 amp breaker can be loaded to 1800 watts before it will trip. If it is a continuous load then the electrical code states that it is only allowed to be loaded to 80%. This will be 1800 x .8 = 1440 watts. If the voltage is not 120 volts use the following equation Watts = Amps x Volts. Amps being the breaker size that is to be used.

For safety reasons ( and the National Electric Code) never put more than 75% load on a breaker, so for you case, 20 amp breaker x 75% = 15 amps 15 amps x 240 volts = 3600 watts 3600 watts

The total load applied to an extension cord is governed by the wire size of the cord. As the extension cord is usually plugged into a wall receptacle. The breaker protecting the receptacle is rated at 15 amps. The total wattage is limited to 15 x 120 volts = 1800 watts. Check the nameplate on the appliances to see what the wattage draw totals. This will give you the answer, any amount that adds up to the total of 1800 watts.

Watts = Amps x Volts. 60 x 240 = 14400

The equation that you are looking for is I = W/E. Amps = Watts / Volts.

Answer for the US: Breakers are rated in amps, not watts. However, a 15A breaker can handle 15 amps, or about 1800 watts (using 120V), or 3600 watts (using 240V). However, this is only rated for noncontinuous loads (those not lasting for more than three hours). For continuous loads (loads lasting three hours or more), one must derate the circuit breaker by 80%. So for continuous loads, that same breaker should only have 1440 watts (using 120V), or 2880 watts (using 240V) on it.

What governs the type of breaker is the voltage and wattage of the heater elements. If the tank is 120V then you would only use one breaker. The size of the breaker you use will depend on the watts of the element. Watts = amps x volts, Amps = Watts/ volts. Once you establish the amperage then size the wire and the breaker to fit. If the tank is 240V the same rules apply only you would use a 2 pole breaker. IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOBSAFELY AND COMPETENTLYREFER THIS WORK TO QUALIFIED PROFESSIONALS. If you do this work yourself, always turn off the power at the breaker box/fuse panel BEFORE you attempt to do any work AND always use a meter or voltage indicatorto insure the circuit is, in fact, de-energized.

To answer this question a voltage needs to be stated. I = W/E, Amps = Watts/Volts.

Multiply the voltage by the amps. So on a 240 v supply it would be 4800 watts.

To answer this question the voltage of the motor must be given. Watts is the product of amps x volts. Amps = Watts/Volts. Once this is found the motor breaker needs to be larger to allow for the inrush start current.

Assuming that the extension cord is plugged into a normal household receptacle rated at 15 amps the cord will handle 15A x 120V = 1800 watts. If the cord is of any length, at that wattage, you will feel the cord start to get warm like a heating cable.

To answer this question a voltage must be given. Watts = Amps x Volts. <<>> Answer At 115 volts ac, 30 amps equals 3,450 watts.

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