This is the method approved by the national electrical code nec.
How to splice romex in attic.
An attic that is accessible which is defined by the nec as having a permanently installed stair or ladder in place must have protection for any cables that run across the top of the attic floor joists or within 7 feet where they run across the face of rafters or studs.
If you come across a wire or romex cable that nee.
The family handyman editor rick muscoplat shows you how to splice in jumper wires to give you the slack you need.
Junction boxes and splicing electrical wiring.
The safest way to splice wires in the attic is by placing the splice inside of a junction box.
The method demonstrated here is the correct way to splice electrical wires using ul approved wire connectors joined inside an approved electrical box.
These connectors can be the familiar twist on wire nuts or newer style push fit connectors.
I would like to add a switch and light to the existing electrical circuit wiring and not have to install more wiring and a new circuit breaker.