What is a junction box how to install it ?

When installing a new electrical device such as a socket or a point of light, starting from the main switchboard is often complicated.

Hence the need to install a junction box through which the electrical circuit will pass before reaching the switch or the socket.

Junction box: what is it?

The junction box, also known as a connection box or junction box, is an electrical box allowing the connection of the wires from the electrical panel to the appliances in the house. This device helps to solve the problems related to the length of the cables which can be insufficient.

As no system is immune to possible failures, the box must imperatively be earthed, which will avoid possible problems of electrocution. A cover is also to be installed so as not to expose the conductors. In the construction sector, it is possible to find several models of junction boxes. Among the most classic are built-in boxes. Here, it may be a question of a connection box to be sealed, dedicated to masonry, a box for drywall such as placo or even an airtight model.

You will also find junction boxes for attics used in technical floors or false ceilings. In general, they are employed in the creation of an electric octopus. For exposed electrical installation, the surface-mounted model is recommended. Finally, the waterproof model will be dedicated to outdoor installations.

Junction box installation mode

The installation of a junction box being simple, DIYers of all levels will be able to achieve it easily. To begin, be sure to turn off the power before touching the electrical wires to avoid any risk of electrocution.

Next, locate the place where you want to put the box. It is important that the latter is easily accessible in the event of a problem. Properly clean the area to work well on a clean area. Equipped with a screwdriver and screws, fix the box on the frame or on a wall. Do not try to hide your junction box by covering it with placo for example. There are specific boxes on the market used to conceal or embed the object in a discreet and aesthetic way.

Then select the wires you want to connect and bring them to the junction box. Strip the ends of the different wires, taking care not to damage the stripped part because a loss of electrical intensity may occur. Then make the necessary connections. Match each color: yellow equals ground wires, blue equals neutral wires, and finally brown or black equals live wires. All you have to do is insert the wires into the connector.

It is a simple operation, requiring no special tools. Continue the operation by installing the cover of your junction box. Pay close attention to the cables which must not interfere with the closure of the case. Also, make sure you don’t unplug anything along the way. Finish by turning the power back on and performing any necessary tests to make sure the system is working properly.

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