My house was built before computers, or television for that matter, and one
circuit has everything plugged into it. I have not had a problem yet, but
it has to be getting close.
There is a 3way switch by the backdoor on the circuit, which goes to a
switch by the front door with a 3wire and then to the ceiling fan/light.
The front door switch shares a box with another light on a lightly used
1) At the back door, replace the feed hot with the white that now goes to
the other switch. (nutting the old wires and putting black tape on the
2) At the front door, replace the white wire (now coming from the other
switch) with a black feed from the other switch in the box, attach the black
wire going to the light with the white wire (again, marking it with black
tape) from the other switch, and connect the white wire coming back from the
light to a white wire already in the switch box.
That will reduce the load on the heavily used circuit by a few amps.
I think this will work, but it is sufficiently confusing that I might be
It sounds as if you have two circuits sharing the same switch box. You are
concerned that one of the circuits has a light and ceiling fan on it and you
would like to move it to another circuit, taking advantage of the fact that
the second circuit is lightly loaded.
It is quite unlikely that either circuit is "feeding" into the box. Rather,
most switches are fed by a "switch loop" dropping down from the load. The
feed goes to the device (light, fan, whatever) and the hot wire is
"interrupted" at the device and diverted to the switch. Sometimes circuits
feed the switch but this is not very common since it results in extra wiring
in the switch box.
In any case, you should not attempt what you are proposing. It would only
work if BOTH circuits fed the switch box, and unless you know this to be the
case, you aren't going even be able to do it. Apart from that, it is going
to be awfully easy to make errors which will somehow tie the two circuits
together, and this is a BAD thing, with all sorts of potential for causing
unexpected deaths and burning the house down.
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