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The differential switches are installed in the electrical panel to protect people from electric shock. There are several types of switches, which are intended to protect certain areas or specific devices. It is mandatory to install differential switches in your electrical installation, according to standard NF C 15-100.

What is a differential switch?

The differential switch is a module to be integrated into the electrical panel. Its role is to protect people from risks electrification or electric shocks. It isolates an electrical circuit during a fault.

A switch protects several circuits or devices in your home. That is why it is necessary to install several. There are different types of differential switches depending on the devices to be protected.

The differential switch differs from the GFCI because it does not detect short circuits or electrical overloads. It is therefore a little less efficient, but also less expensive. Prices do not usually exceed 100 €. The price depends on the size of the switch (from 25 to 63A), and its type.

What are the types of differential switches?

It is mandatory to install at least one differential switch type A in any dwelling. It protects the cooker or hob, as well as the washing machine.

A differential switch AC type is necessary to protect lighting circuits, sockets, etc. It takes one in a dwelling of less than 35 m2, two for an area between 35 and 100 m2, and three in a dwelling of more than 100 m2.

The differential switch Hpi type may be recommended for freezer, alarm or computer equipment.

The installation of your differential switches must meet the standards in force: call an electrician who has the know-how, and the required authorization.

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