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What is the purpose for a fuse or a circuit breaker what would happen without them?
Wiki User
∙ 14y ago
Purpose of Fuses [and Circuit Breakers]
Fuses and Circuit Breakers are safety devices designed and installed in electrical circuits TO PROTECT the conductors [wires] from short circuit and overload conditions which can cause extreme overheating of the conductors, that can result in damage to the conductors, and in worse case scenario the possibility of a FIRE which could destroy the vehicle.
When a fuse, and its replacement, "blows," is an indication of an UNSAFE CONDITION in that circuit.
Some ingnorant few people will suggest installing a larger fuse to correct the blowing problem. To install a larger fuse would invite damage to the wiring and an electrical system fire.
The proper "fix" is for a qualified technician, who knows what he/she's doing, to:
- troubleshoot the circuit,
- find and identify the defect, and
- make proper repair [s], BEFORE replacing the fuse again [with the properly sized fuse for the circuit].
Wiki User
∙ 14y ago
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What happens when the circuit is complete and the switches are closed?
*Look at the simple circuit illustrated in Figure A-2. What will happen when only switch S1 is closed? Correct Answer= "Nothing will happen-the light bulb won't light up." <<>> If there is a load in the circuit the load will operate. If there is no load in the circuit and it is complete then a short circuit will occur and something in the circuit will burn open. If the circuit is complete and there is a fuse or breaker in the circuit, then the fuse or breaker will open the circuit.
What do you think would happen if you put a 3A fuse in a plug used for kettle?
I know what would happen. The three amp fuse would blow. Any device that is plugged into a receptacle with out having sufficient resistance to limit the current flow will dead short the circuit and cause the breaker that feeds the circuit to trip. In this case the fuse being of a lower rating that the feed breaker the fuse will blow without tripping the receptacle's feed breaker.
Why should a earthing circuit have low resistance?
The purpose of an earthing (protective) conductor in a residential installation is to allow sufficient fault current to flow, in the event of an earth fault, to enable the operation of the circuit's overcurrent protection device (fuse or circuit breaker), so its resistance must be sufficiently low to allow this to happen.
Is it possible that a circuit breaker can explode?
The definition of the word explosion is, a rapid expansion of gases. It may occur from physical or mechanical change. As there in no gases involved in a common circuit breaker the answer has to be a definite no. If a circuit breaker short circuits internally across the line the only thing that will happen is the safety protection up stream from the breaker will trip and take the faulted breaker off line.
Why does plugging too many appilances into the same circuit cause too much current to flow through the circuit what will happen as a result?
Each appliance has its own amperage. This can be shown by looking at the label of each appliance. A circuit is protected by a breaker which has a trip limit. By continually adding more amperage from different appliances, the circuit becomes overloaded. When the circuits limit is reached because of the additive effect of more appliances to the circuit the breaker will trip. This disconnects the appliance loads from the distribution panel supply and prevents over loading of the conductors of that circuit. Without removing some of the load amperage, the breaker will keep tripping when reset.
What would happen if a 240V breaker was on and someone attempted to turn on the clothes dryer?
Don't understand this question. If the breaker is on, then the dryer would function normally, if the breaker your are referring to is the one for the dryer. If the breaker is off then no function. A dryer runs on 220.
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.
What would happen to circuit if there was no resistance?
a circuit with no resistance or zero resistance can be considered as open circuit in which the current is zero. without resistance the circuit just becomes open ()
What will happen if a phase and neutral test by a mutimeter shows continuity?
If the test shows that there is a continuity between the phase leg and the neutral with no load connected, then that circuit should not be energized. If the circuit was energized then the fuse or breaker protecting that leg will trip the circuit open.
What happen if the window is not going up or down?
One window, probably the switch or the electric window motor. All windows, probably the fuse or circuit breaker.
Which circuit faults will not result in overheating the circuit?
An open circuit won't cause any overheating because no current is flowing. Other faults like ground fault or a breaker tripping should happen fast enough not to cause any overheating either.
Why fuse wire is placed in series with the device?
circuit breaker and fuses used in series to break the circuit in overcurrent situation to block current to flow through circuit.
