a fuse wire melts when current passing through it exceeds a certain value as in overloading and short circuiting .this breaks the circuit prventing further current flow and damage ..
A circuit breaker does not have a wire fuse in it.
circuit breaker, or "resettable fuse", which is a reallya small circuit breaker in the housing of a fuse
The only time that fuse holders gets hot is when there is a loose connection between the fuse holder and the wire connected to the holder. If this is happening remove the supply voltage from the circuit that the fuse holder is in. Remove the wire from the holder. Cut the burned end of if there is enough wire and re install. If not enough wire, use a wire brush to get the oxidation off of the wire. Apply a coating of anti oxidation compound on the wire end and then re install into the holder. Tighten the wire into the holder very tightly. Check the spring clamping pressure of the fuse end of where the heating occurred. This spring clamping pressure is important for low resistance conductivity. If the fuse feels loose when installed change the fuse holder for a new one.
Sure, you can replace a 15 amp fuse with a 30 amp fuse, but it's not recommended. The 30 amp fuse has a higher current rating, which means it can allow more current to flow through the circuit than what it was designed for. This can pose a fire hazard and damage your electrical equipment. So, technically you can do it, but it's like putting a square peg in a round hole - it might fit, but it's not a good idea.
A 240 volt street light circuit is wired in parallel connections. In the base of the street fixture an inline fuse is connected into the circuit that goes up to the fixture to protect the lamp head.
It is a safety device. It is not an essential part of the circuit.
A circuit breaker does not have a wire fuse in it.
The wire that connects the power source to the rest of the circuit should contain the fuse. This is typically the wire that leads directly from the positive terminal of the battery or power source. Placing the fuse in this wire helps protect the circuit in case of a short circuit or overload.
A fuse in its simplest form - is simply a short piece of wire that is weaker than the circuit it is protecting. When the current flowing through the circuit exceeds the fuse rating, the fuse wire melts - breaking the circuit.
If a thick copper wire is used in a fuse then by definition of a fuse this device would no longer be defined as a fuse. A fuse in a circuit is used to protect the conductors feeding the load of that circuit. The circuit, if using a thick copper wire in a fuse, would then be considered as a non fused circuit.
A fuse is intended to be a weak link of thin wire that goes in series with a circuit. If the current becomes too high for any reason, the fuse wire melts and cuts off the supply. Without a fuse, the circuit will heat up until something else melts, which might cause a fire. So fuses are necessary to prevent electrical fires.
Check the headlight fuse that's INSIDE the box. If an oversized fuse has been put in the fusebox you will have problems with the wire overheating whenever there is a problem in the circuit. There is a short circuit (wire touching chassis ground) somewhere in the lighting circuit, but the wire is burning because an oversized fuse has been put in the circuit.
A fuse is typically connected to the live wire in a circuit. This is done to protect the circuit from an overload or short circuit, as the fuse will blow or trip and cut off the current flow if there is an issue.
The fuse is always placed in the hot wire (usually black in color) in a circuit. This is to protect the circuit from excessive current flow, which could lead to overheating and potentially cause a fire. Placing the fuse in the hot wire allows it to interrupt the circuit in case of a fault.
A fuse contains a wire that will melt and break the circuit if too much current flows through it, preventing an overload. When the current exceeds the fuse's rating, the wire melts, interrupting the flow of electricity and protecting the circuit from damage.
The fuse will be blown off in case of any fault. But the circuit will not be isolated because of the presence of fuse in nutral line. current will still flow and the line will be so dangerous.
The fuse or breaker should be no bigger than specified for the wiring and devices on the circuit. Your nominal current draw may be 20 amps, but a short circuit would cause maximum current to flow which in this case would be 100 amps until the fuse blew.