Curious about the term, and usage of, "back wiring" as it applies to simple
residential wall switches:
The kind of switches I've used in my house over the years that had a "back
were that they were simply provided with holes for the stripped wires that,
once pushed into, were held
by spring loaded grippers internally.
But I see that the term is also apparently used for the metal plate that
some switches now come with
which is under the normal wire holding screws. This plate has a simple
groove in it that apparently you
push the stripped wire into. The screw, when tightened, applies pressure to
plate and thus holds the stripped wire in place via the plate's groove.
Guess you could call it a pressure-plate.
a. Really want to be sure that I am using it right: is this a correct
description of how it is supposed to be used ?
b. Also, which is best: the holes in the back, this pressure plate
approach, or the screws themselves.
Screws are best; sometimes they are difficult for one reason or another and
then the pressure plate is adequate.
The holes in the back are terrible and should never be used. In fact,
switches with holes in the back are terrible and should never be used.
IMHO, the back-wired screw-clamp terminals are best, and a 3/4 wrap
clockwise around the screws is a close second. The spring-loaded
back-things aren't much good, but at least they've gotten better now
that they will only accept a #14 wire.
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