switch leg colors rule

[niteNite]

in my three years as an electrician, I’ve learned that jobsite law usually hits harder than the NEC. I’ve spent my career wiring 277V lighting using pink switch legs and purple travelers, but a recent 120V job threw me for a loop.
My journeyman stopped me midpull and insisted that 120V switch legs must be orange, forcing me to rip out all the pink wire I’d already installed. I spent three hours in my hotel room scouring the code book that night, only to find that the NEC doesn't actually mandate specific colors for switch legs based on voltage.

Beyond the standard rules for neutrals and grounds, wire color is usually dictated by project specs or company tradition to keep different voltages identifiable
have you ever been forced to repull wire over a rule that isn't actually in the book? and is this even necessary?

 

[ViktorArseid]

Not necessary by NEC from what I’ve seen, but I’ve been on jobs where color was the only quick way to separate 120 vs 277 in a crowded ceiling. It saves mistakes later, so I can see the logic even if the repull feels brutal.

 

[BergardZeman]

I haven’t had to repull a whole run yet, but I’ve definitely had a foreman enforce a “rule” that was really just a company standard. It felt annoying in the moment, but I get the intent if the site has multiple voltages and they want zero confusion later. In 2026 I’m trying to be better about asking for the spec sheet or the shop color chart before I pull anything.

 

[PGB1]

Maybe that person was just being a big shot in his own mind.

I only work pipe, but B.O.Y is the tradition for 277/480. (Brown, Orange, Yellow). And we use Grey for neutral on 277. Never have I had a job specify otherwise for a switched leg.

Instead of a special color for a switched or switching leg (which will surely confuse someone later) extensively I use labels and/or group loops for identification to help someone later.

For 120 volt switched legs, we use any phase color- except orange. Orange with 120 traditionally is reserved for isolated ground circuits. Traditionally- not code mandated.

 

[Alan]

You are right that the NEC is strict on grounded conductors and grounds, but it does not usually care what color you pick for a 120V switch leg. Most of the time orange is a spec thing, a shop standard, or a foreman rule so the next guy can trace it fast. If the GC, engineer, or owner spec says orange for switched, then yeah you repull even if it is not in the book. The clean move is ask to see the spec section or the one line legend before you burn hours.