Why do the fuses blow in the car?

The fuses protect the vehicle’s electrical circuits from short circuits and overloads. If there is a malfunction in the electrical circuit or an excessive number of power consumers, it is overloaded and a short circuit occurs. The wire and the winding of the generator are overheated, the electrolyte in the accumulator may boil. It is the fuses that protect against this, interrupting the current flow when its power exceeds the permissible value.

There are several reasons for fuse blowouts:

The first is damage to some electrical node or wiring element, which leads to a short circuit. As a result of such damage, the current moves along a shorter distance having a lower resistance. The decrease in the resistance of some part of the circuit, according to Ohm’s law, leads to an increase in the amperage. As a result, a fuse is burned in the fuse, the electrical circuit is opened, preventing a short circuit. In this case, you need auto parts Mitsubishi, Toyota and so on, depending on the brand of your car, but you can buy it all on sibal-auto.ru.

The second is overload (current jump). Occurs when a certain part is jammed, which is driven by an electric motor. In this case, a high current load appears inside the motor. It takes over the fuse and burns, keeping the electrical circuit.

The third is poor contact between the fuse and the shoe. In addition to the combustion of the fuse itself, its body and shoe are fused. This can occur when low-quality fuses are used that only melt, causing the plastic fuse box to melt and the contacts burn out. This is an extremely serious defect, capable of disabling a whole block of fuses.

It is noticed that the fuses are most often burnt during the electrical circuit, as when heated, the metal wires of the wiring increase their resistance. When turning on, a current surge occurs, which is larger than that consumed by normal operation.