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Because the amount of heating depends on how much current is in the wires. So you set the CB to cut the current if it exceeds the rated current for that wire.

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Q: How do circuit breakers keep the wires in an electrical circuit from over heating?
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Related questions

How do circuit breakers keep the wires in electrical circuit from overheating?

They reduce the flow of electrons.


How do fuses circuit breakers protect your home against electrical fires?

because wires can get really hot and start a fire


What regulates the flow of electrons in an electrical circuit?

a. amperage and voltage b. the size and length of the wires c. voltage and resistance d. fuses and circuit breakers


Where is the fuse for the ground for a 1984 Monte Carlo?

Ground wires, conductors, or circuits ARE NEVER FUSED. Fuses and circuit breakers are put in the wires and conductors supplying electrical current TO devices needing electrical power, and ARE NEVER PLACED IN the ground portion of the circuit between the electrical power consuming device, and the battery negative terminal.


What causes home air conditioning not to work?

Open circuit breakers. Poor electrical connections to the compressor, thermostat or bad wires not telling relay to cut the compressor on. Elaborate


What are breakers?

A breaker is a device that is used to connect and disconnect the buss bars of an electrical panel to the feed end of wires that feed an electrical load. The function of a breaker is to protect the wires from an overload by the use of an internal thermal trip, and to protect the load and wires from a short circuit by use of an internal magnetic trip.


What are the required for electrical panel?

The main items required for an electrical panel include the panel box itself, fuses, and wiring. The wires are fed into the box and attached to a series of circuit breakers to allow electricity to be directed as needed.


Is it necessary to wire for an electric range and dryer if you are using gas to meet code?

I don't think you quite understand your question. If this is new construction, (or redesign), and you are installing a gas range, the gas line has to be installed to code. If you are abandoning already installed electrical wiring, you should either remove the wiring and the circuit breakers or securely seal the ends of the wires with wire nuts and tape and turn off the circuit breakers. It also helps to lable the wires and circuit breakers as "old - not in use".


Where can you buy a 220 circuit breaker here in US?

at your local hardware store go to the electrical dept, not the normal but the contractors area and you should find a 240v circuit breakers, fuses, junctions, wires and anything else you can think of!TucsonDirect


What wires do you use for an electrical circuit?

wires that have got good conductivity and less losses


Why is it important that homes have circuit breakers?

Fuses and circuit breakers are meant to protect your home's wiring from the heat generated from fault-currents and over-currents. Over-currents happen when you exceed the amperage the fuse or breaker is rated for over a period of time (IE: drawing 20 amps on a 15 amp circuit breaker). When this occurs a fuse or circuit breaker will open the circuit so the wiring in your home will not be damaged. Over-currents happen when electricity finds a path, other than the one intended, to ground. When this happens there is very little resistance to slow the flow of electricity and the amperage through the circuit can exceed the fuse or circuit breakers rated capacity by several hundred times . These type of faults cause the fuse or circuit breaker to open the circuit very quickly.


Always treat electrical wires in a circuit as being?

Energized.