I opened a 3-gang box and found that the three switches in the box
were connected by one black wire, not three black wires coming
from one nut to the three switches. One black wire literally goes
from the first switch to the second to the third. A section of the
wire insulation was removed and the exposed wire circled around
the screw of a switch. This is how the three switches wired.
I know it works but wonder whether this is a good practice. Does
the code say one has to use a wiring nut?
Actually, I would think running a pigtail would create the potential for
all of them to "go dead". If one were to run a single wire around each
screw on multiple switches, and one screw came loose, only that switch
would be affected.
On the other hand, if the wire nut were to come loose, multiple switches
may be affected. Beside, does it really matter if some or all of the
switches are affected? You'd still have to turn off the power and go in
Unless of course, you have some life saving equipment plugged into the
outlet served by that switch.
My .02 worth: It might be legal, but it's poor workmanship and
mechznically unsound. I can't think of a way to wrap a piece of
unbroken wire around a screw and tighten it down in a way that
won't damage the wire or result in a very poor mechanical hold
on the wire. If you "wrap it around" the screw you are crunching
the daylights out of the crossover point when you tighten the
screw. If you try to "Omega" wrap it, the bends at the bottom
of the "loop" are either going to be way too sharp, or they're
going to be wider, and that won't keep much of the wire under
the screw. I know, that's a lot of words to say "bad connection"
but that's how I'm seeing it.
The real Tom Pendergast [ So if you meet me, have some courtesy,
aka I-zheet M'drurz [ have some sympathy, and some taste.
I was certain that it was improper to pass a hot from switch to switch; it
was obligatory to use pigtails.
But when I tried to find the code section I couldn't find it.
Hopefully someone can do better.
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