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To calculate an answer a voltage must be stated.

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To calculate an answer a voltage must be stated.

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Q: What size breaker do you need for 3kva?
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What size breaker do you need for 9000W at 440V 3 phase delta?

50amp but if considering the breaker cannot withstand starting current you need to size the breaker up.


What Size breaker for 6 gauge wire?

You need a 60 amp breaker.


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8 AWG is typical.


What size breaker do you need for two 60W bulbes 110 volts?

It is not the number of bulbs that you worry about. It is the wire size that is your concern. If the circuit is wired with AWG 12/2 wire then use a 20 amp breaker. If it is wired with a AWG 14/2 wire then use a 15 amp breaker. You are protecting the wiring with the correct size breaker.


What size breaker do you need for 9000W at 440V 3phase?

This formula will give you the amperage I = kw x 1000/1.73 x E x pf (pf = power factor). Take the amperage and multiply it by 125%. This will give you the breaker size that you need.


When installing a circuit breaker do you size the breaker to correct wire size or the device its controlling?

When installing a circuit breaker, you size the breaker based on the wire size. The breaker should be matched to the ampacity of the wire to ensure proper protection against overloads and short circuits. The device being controlled by the breaker is not a determining factor in sizing the breaker.


What size wire and breaker do you need to run a 9000max watt generator?

If it is a portable generator the breaker should be self contained within the generators panel. If the generator is a stationary standby unit a voltage has to be stated to calculate the conductor size and hence the breaker size to protect the conductor. Amps = Watts/Volts.


What is the wire size for a 35 amp breaker to a ac unit?

You will need to use #8 wire.


What size breaker do you need for 5.7kw neff oven?

A breaker is sized by the wire size. The wire is sized by the amperage. The formula for amperage is I = W/E. Amps = Watts/Volts. As you can see with no voltage stated an answer can not be given.


What size wire and breaker you need for metal halide 400w bulb?

The size of wire and breaker sizing are based on the current of the circuit. To answer this question a voltage must be stated or look on the ballast for the amperage and add that to the question.


What size wire and breaker do you need for a 5000 watt garage heater?

Look on the heater and see what amps it is pulling. That will determine the wire size and breaker size. It must be on a dedicated circuit. 15 amps = AWG # 14 wire with 15 amp breaker 20 amps = AWG # 12 wire with 20 amp breaker 30 amps = AWG # 10 wire with 30 amp breaker 40 amps = AWG # 8 wire with 40 amp breaker