Determine the size of box you need based on the wire size you wish to join. Junction boxes sold at any home improvement retailer work for home projects.
Mount the box in place with the fasteners provided with it.
Pull the wires into the box leaving 6 inches of each wire hanging out of the box, and then cut off the excess.
Cut away all of the cabling's outer jacket that is visible inside the junction box.
Bring the exposed copper wires together, twist their ends together in a clockwise motion then cover then ends with a wire nut.
Strip away 1 inch of the white wires insulation and then twist and cover with a wire nut. Repeat this process with each color of wire.
Push all of the wires back inside the junction box and seal it with a junction box cover.
Things You Will Need
- Junction box
- Phillips screwdriver
- Standard screwdriver
- Wire strippers
- Wire nuts
- Junction box cover
- Check your local electrical codes to know how many wires you are allowed to join in one junction box.
- If working with a metal junction box, affix a ground tail to it and then connect this to the other exposed ground wires so the box itself is grounded.