One switch providing power to another?
Question in short:
Can the load side of one single pole switch be used as the
feed/line side to another switch?
I want to install a timer for my bath exhaust fan. The current switch for the exhaust fan is part of a decora double rocker switch where the top rocker controls lights above the sinks and the bottom rocker controls the exhaust fan. This double rocker switch is cut into a very large mirror on the wall. So I want to avoid cutting the mirror to make room for a larger work box.
The attic above the bath is roomy enough to work in and some of the romex is run along the joists and readily accesible.
I was thinking of installing the timer on an adjacent wall,
splicing(in a j-box) into the run in the attic to the exhaust fan and running 12/2 back down to the timer(properly designating the white in this run with black tape).
In this setup the bottom rocker of the double decora switch would "feed" the timer.
Would like to hear some thoughts on this idea whether you think it would work(well it will work) but more importantly if it is OK.