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The electrical network of the house must meet the NF C 15-150 standard. Out of the question, for example, to excessively multiply the number of taps on the distribution circuit. To increase the number of lines, it is necessary to place junction boxes.

Electrical circuit: install a junction box

These can be laid down or recessed. The principle of a junction box is simple. The new power lines are connected by fixed terminals (or terminal strips) to the distribution line. Pay attention to the color of the wires during assembly!

Depending on the material, there are two types of enclosures: for solid walls (concrete, brick...) and for hollow walls (plasterboard...). The hollow wall housings have claws that prevent them from moving in the wall.

Connect the cables to the wire puller

Connect the cables to the wire puller

Twist the ends of the cables, then connect them to the wire puller. Surround the set with an adhesive tape. Gently pull the wire puller to pass the cables. If you feel resistance go back and start again.

Fill and seal the junction box

Fill and seal the junction box

Place the ducts in the junction box. With a trowel, fill the bottom of the cavity with plaster. Position the case flush with the wall, then block it with plaster. Fill in the remaining empty spaces completely to seal the case.

Test the circuit and fill the slits

Test the circuit and fill the slits

After drying, remove excess plaster with the edge of the trowel. Before filling the grooves, test the circuit for later intervention if necessary without breaking the freshly laid plaster.


Video Instruction: D I Y How to Install and use an Electrical Junction Box