Is it ok (code compliant and not otherwise inadvisable) to twist two or more THHN conductors together (before running in conduit) ?
Issues I can imagine:
- EM fields cancel out. Not a bad thing.
- Twisting stresses the insulation jacket. Seems like you'd have to twist REAL tight.
- Causes excessive heat buildup – this one seems like it could actually be a concern.
I want to twist a couple of neutral-hot pairs together, to keep distinct within one conduit. Easy to do by chucking the two ends together in a drill. Should give a nice clean look.