Why don't they make 4 wire Romex (plus ground).
There are many 2 or 3 way switch circuits that need 4 wires plus the
ground. 3 wire is all they sell. I can think of other cases where I
could use 4 wires too. For example, I had to run two common strands
of romex to a double light switch that also feeds an outlet. Two
switched wires, one hot, one neutral. That's 4 wires. So now I have
an illegal white wire controlling a light from a switch. Why not 4
wire romex with black, red, blue, and white. (patriotic too).
I googled "4 wire" romex and got:
Results 1 - 10 of about 4,670 English pages for "4 wire" romex
This was from the third hit (part way down the page)
We have what I call 12/4 Romex. Red, Black, and 2 White in romex. We
use 3 or 4 wire home runs whenever we can.
John A. Peters, Electrician SF
There are two types available. 14/4 and 12/4 have the black, red, blue,
white, and bare ground. 14-2-2 and 12-2-2 have a black, white, red, white
with red stripe, and ground. You need to go to an electrical supply company
to buy this stuff.
You can also get 4 wire armored cable.
Home depot and Lowes both have 12/2/2, but you certainly don't need it for 3
BTW, your white wire controlling a light is not illegal. It may be against
code however if you don't remark it with tape.
As someone else pointed out, for a "switch loop" you can make a white wire
hot. And, of course, you CAN get the 4 wire romex (in TWO types of
marking) that you want.
You might consider just accomplishing what you want by separate the circuits
and using, for example, the 2 wire romex for the outlet. Even if the 2
wire romex runs between the same two boxes as the 3 wire romex, you should
only connect the two neutrals at the source end. The general idea is that
the sum of all the currents in one romex should be zero.
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