Additional switch and bulb
Hello. There is an operating switch and a light bulb. It is necessary to connect another switch and a light bulb to these wires. The problem is that the junction box is unavailable - a repair has been made and it has been oiled. Can I connect to two existing wires (they exit the wall) that are connected to a switch and a light bulb without penetrating the junction box?
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You can’t, two wires in the switch is a break of a phase wire, and you need a phase and a zero. Power from the nearest outlet once it is not possible to power from the junction box.