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The breaker protects the wiring not the boiler. 12,000 watts at 240 volts will require 50 amps. So, you will need a 60 amp breaker using AWG# 6 wire on a dedicated circuit.

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Q: What size amp circuit breaker would protect a 12kW boiler?
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How do circuit breaker keep the wires in a electrical circuit from overheating?

A circuit breaker is designed to 'break' in a circuit if a short circuit (or other malfunction) occurs. This prevents overheating (or burn-out) of the circuit wires. In older systems, you would need to find which fuse wire has fused and replace it. In a circuit breaker, once the fault has been found and corrected, the breaker is simply switched back on.


What is a 30 amp circuit breaker used for?

A 30 amp circuit breaker is needed unless the load is a motor circuit, then it has to be sized to 250 percent of the motors full load amps. For 30A circuit is needed breaker 30*1.25=37.5 --> 40A. If load is lamp or heater, then use breaker of group A or B. If load is motor, then use breaker of groupC or D (very hard start) or special safe breaker for motor - with variable amp setpoint. See related link also. By code you are only allowed 80% of the rating of a breaker. So 30x80%=24amps. 24 amps is the MAX allowed on a 30 amp breaker. You would need a 40amp breaker for a 30 amp circuit. 40x80%=32. So you would want a double pole 40amp breaker.


What actions would you take if you find a circuit breaker is stuck?

Replace it immediatly, the breaker is no longer within code.


What is making capacity of a circuit breaker?

Hard to define... A four year old child has the strength to physically "make" a typical household circuit breaker, while a teen would be able to "make" a typical industrial circuit breaker. (The latter breaker being physically much larger than the former.) Circuit breakers have their "breaking capacity" rated in AMPS. A typical household breaker is rated at 20, 30 or 50 Amps. Industrial breakers might be rated at 500 amps or a thousand or even more. Hope this helps but if it didn't answer your question, please rephrase it and ask again.


ELCB vs MCB?

Earth Leakage Circuit Breaker(ELCB) was given to a device that breaks the power supply when a fixed amount of current ,say 25-40 milli amperes flow through the earth line. The MCB (Miniature Circuit Breaker) is a device designed to protect a circuit's wiring from the serious damage which would be caused if it has to carry a current which is too high for the diameter of the its wire

Related questions

How does circuit breaker or fuse protect the house from fire?

The fuse is matched to the size wire in the circuit the breaker/fuse it is protecting. For instance, a 20 amp breaker/fuse is used in combination with AWG 12/2 wire. A 15 amp breaker/fuse would be used with AWG 14/2 wire. If there is too much current flow in the circuit caused by either overloading the circuit or by a short in the wires the wiring would overheat and catch fire if not for the breaker/fuse. The breaker/fuse is designed to detect this and to trip or blow and shut off all power flowing to that circuit and prevent a fire. This is why you should never install the wrong size fuse. Put a 20 amp fuse on a 15 amp circuit and it would not protect the circuit as it should.


What is the device to break a circuit?

Switch (mechanical or electrical), breaker or fuse.a switch


What would cause a circuit breaker heating element to trip off?

There are two conditions that would cause a breaker to trip off. One is an overload of the circuit and the other is a short circuit on the circuit. The heating element within the breaker is what monitors for circuit overloads.


Can a 8 amp be changed to 15 amps on circuit breaker?

If you are asking if you can change an 8 Amp Circuit Breaker to 15 Amps, the answer is no. If there is an 8 A breaker in place it is sized to protect the wiring and devices on the circuit. Increasing to 15 A would defeat this protection and could cause a fire or cause a connected device to be destroyed with higher amperage.


What would cause a short periodic low hum to come from a circuit breaker?

A bad circuit breaker. Replace it.


What would happenif you put an 8 amp circuit-breaker in a power circuit?

The circuit would be protected up to 8 amps before the breaker would trip. Any more that 8 amps and the circuit would open and shut the circuit off.


What is an example of a circuit interrupter?

An example of a circuit interrupter would a fuse or circuit breaker.


Why would a circuit breaker switch spark?

the circuit breaker spark when it comes an over load, loss contact,but the probable cause is loss contact...and also the circuit breaker is going to be damage or destroyed.


What one is better fuse or circuit breaker?

IMO it would be because the circuit breaker has the possibility of going bad and not working (allowing a short to move through the device), but fuses blow (cause a break) no matter what if shorted.


Can you use any other brand of circuit breaker in conjunction with a Challenger circuit breaker?

A Murray or similar breaker would work but most inspectors want the brand breaker to match the brand panel.


How do circuit breaker keep the wires in a electrical circuit from overheating?

A circuit breaker is designed to 'break' in a circuit if a short circuit (or other malfunction) occurs. This prevents overheating (or burn-out) of the circuit wires. In older systems, you would need to find which fuse wire has fused and replace it. In a circuit breaker, once the fault has been found and corrected, the breaker is simply switched back on.


What if your circuit breaker started tripping with no change of things plugged into an outlet Does this mean the circuit breaker needs to be replaced?

Circuit breakers can degrade over time but it would be better to get a competant electrician to do it. It might also mean you have too many things plugged into one outlet. Sometimes one circuit breaker may protect several outlets so it might be tripping because of a change in another outlet. ELECTRICTY IS DANGEROUS!!!! Don't do it yourself.