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The wire is sized to the breaker in the main box that is feeding the subpanel. The calculations for the subpanel is based on what devices will use the subpanel and an estimate of duty factors for the devices. An electrician can provide this information, or you can look on-line in the National Electric Code for estimation methods.

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Q: What size wire is best to run for a breaker box piggy back from another breaker box?
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Does DTE Energy install breaker boxes?

To the best of my knowledge, DTE dose not install breaker boxes. To have one installed you should contact an electrician.


Every time you vacuum you blow the breaker in your house can you change the breaker?

Either your breaker switch needs to be changed for a heavier one, the pool equipment needs to be put on an other circuit or better still one of its own.It is best to talk to an ellectrician about the delails involved.


What size circuit breaker should be used to carry 22.9 Amps?

If this is a constant 23amp draw, best to go with a 50a breaker. Overkill in electrical is always a safe method. Need to allow for spikes or additional load if something else is inadvertently placed on that same line


Can you connect an electrical shower into the same circuit as the tank immersion heater?

Would be best not to ... especially if both, when turned on, will exceed the amperage rating of the breaker to which they are connected.


What voltage should read at the outputs of a hundred amp breaker?

It depends on where the breaker is fitted. Is it installed in a panel in the US, Canada or another country which also uses the 60Hz, 120 Volts standard supply service?Or is it fitted in Europe or elsewhere using the 50Hz, 230 Volts standard?As always, if you are in doubt about what to do, the best advice anyone should give you is to call a licensed electrician to advise what work is needed.Before you do any work yourself,on electrical circuits, equipment or appliances,always use a test meter to ensure the circuit is, in fact, de-energized.IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOBSAFELY AND COMPETENTLYREFER THIS WORK TO QUALIFIED PROFESSIONALS.The amperage of the breaker dont determine the voltage reading. If your panel is 120v every breaker regarding of amperage rating or size will still read 120v. but to answer your question as it reads... the voltage on the output should read the same voltage as the input or line side.. that is if the breaker is in the on position.

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What best breaker rating for 1.5 hp air con unit?

The breaker you use is determined by the size of the wire in the wall not by what is being connected to that circuit. If you have 14/2 wire then use a 15 amp breaker. If you have 12/2 wire then use a 20 amp breaker. The breaker protects the wiring not the item connected.


What best breaker rating for 1.5 hp air-con unit?

The breaker you use is determined by the size of the wire in the wall not by what is being connected to that circuit. If you have 14/2 wire then use a 15 amp breaker. If you have 12/2 wire then use a 20 amp breaker. The breaker protects the wiring not the item connected.


What is the best suitable component for circuit protection instead of fuse?

circuit breaker, or "resettable fuse", which is a reallya small circuit breaker in the housing of a fuse


Does DTE Energy install breaker boxes?

To the best of my knowledge, DTE dose not install breaker boxes. To have one installed you should contact an electrician.