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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 wire do you need to wire a 200 am breaker box?

6


What size wire do you need for a forty amp breaker?

8 AWG is typical.


A range name plate says 78 amps what size breaker needed?

To determine the size of the breaker needed for a 78 amp range, you typically need to use a breaker that is the next size up from the amp rating. This means that you would need an 80 amp breaker to safely accommodate the 78 amp range. However, always consult with a qualified electrician to ensure the correct breaker size for your specific electrical setup.


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 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?

For a 400W metal halide bulb, you will typically need a 14-gauge wire and a 20-amp breaker. However, it is recommended to consult the bulb's manufacturer specifications to ensure the correct wire size and breaker are used for safety and efficiency.


What is the standard to select circuit breaker?

Add up your amps to calculate your breaker size. Add up your loads (amps), divide by 0.8, and choose that size breaker. If that number does not correspond to a standard size breaker you go to the next higher standard size breaker.


What size breaker can you use on a 7500watt generator?

Depends on the wire size you are using. If the generator breaker is a 30 amp then install a 30 amp breaker.