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Short circuits can happen for many reasons. They represent risks that should not be neglected. Simple shots that jump to fires, the consequences of a short circuit can be serious.

The causes of short circuits

The short circuit is also called "fault". There is a short-circuit when two conductors of different polarity come into contact. This contact then creates a current discharge greater than normal, which creates a short circuit current.

The short circuit current can have various origins. First of all, it can be of climate origin: the absence of a surge arrester or lightning rod can generate short circuits.

Its origin can also be internal: the short-circuit can be due to a internal surge, also known as maneuvering overvoltage, or the presence of a branch or animal in the electrical system.

A short circuit can also be caused by insulators in bad conditionespecially if the electrical system is corroded, too old or too wet.

The risks associated with short circuits

The short circuit can sometimes go unnoticed. This is called a self-extinguishing short-circuit, when the short-circuit occurs for a very short time and does not trigger the protection devices of the electrical system such as fuses or circuit breaker.

The short circuit can also be fugitive, if it causes short cuts at the network level without requiring the intervention of an electrician. If the cuts in the network are longer, it is called semi-permanent short circuit. Finally, if the interruption of the network is long and requires the intervention of an electrician, we talk about permanent short circuit.

The risks related to short circuits can be more or less important. They can generate irreversible damage equipment or electrical circuits. These impairments can also generate electrocutions or fires. Sometimes short circuits can cause electric arcs.


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