Not even sure if it's OK to do and, of course, local codes prevail.
OK, so you need to run a 15A 14/2 line to a load. All you have is 14/3. In general, is it ok to use 14/3. Of course it's the same capacity but what is the right thing to do with the red wire?
I'm thinking:
- Snip it off at both ends right at the sheathing leaving and using the b/w/g as usual.
- Tape and mark as Not COnnected at both ends or something.
- I saw once where they took the red wire, bent it back to the sheathing and curled it around it. Maybe some universal wiring message.
I know this is not clean and pro to do but why not? I thought about it and said what if I were running cable to a ceiling fan on a wall switch. The fan has no light. If one were to think ahead they would run 3-wire so in the future addding a light kit or replacing the fan with one that has a light would make it easy to change the wall switch setup to control light & fan.