Doing some electrical work in my brother-in-law's condo. Because of a
wall that was taken down, I have to make a splice box to rejoin some
circuits. One of which was a light switch for the hallway.This will be
in a sheetrock wall so I have to cut in an old work gem box The only
problem is one gem box is to small to fit 4 BX cables, so I wanted to
put 2 gem boxes. But now how do I put in only 1 light switch? Is there
a cover plate made for that purpose? Or am I missing something here?