DIYbanter - View Single Post - joining wires without a junction box within a wall

wrote:
Definitely DO NOT just twist the wires together and wrap with a lot of
tape!

Just curious, would/could this practice lead to a fire caused by
inductive heating?

Simply twisting together two or more 12 or 14 gauge solid wires does not
guarantee a solid connection. Having the junction inside an accessible
box assures the following:

- Room for a clamping device (e.g. wire nut)
- Accessibility for future inspection or repair
- In the event of a connection failure the likelihood of fire spreading
outside the box is reduced