Breaker swap dazard and need MWBC label advice!

[cream5oda]

Running a MWBC to my grandparents shed/outbuilding and need a sanity check!
I'm using a 15 amp double pole breaker, but I ran 12 gauge wire out there for minimal voltage drop (even though 15 A is enough).
Inside the shed, I'll split it into two circuits, which are 12 gauge for the outlets and 14 gauge for the lights.
I'm thinking, if someone sees the 12 gauge wire and the double pole breaker, they might assume it's okay to swap that 15 A breaker for a 20 A one, which would overload my 14 gauge lighting run.

How can I clearly mark this setup in the panel so no one accidentally overloads that 14 gauge circuit down the road? Or should I just bite the bullet and run 12 gauge to the lights too? Thoughts?

 

[electr0roy]

Running a MWBC to my grandparents shed/outbuilding and need a sanity check!
I'm using a 15 amp double pole breaker, but I ran 12 gauge wire out there for minimal voltage drop (even though 15 A is enough).
Inside the shed, I'll split it into two circuits, which are 12 gauge for the outlets and 14 gauge for the lights.
I'm thinking, if someone sees the 12 gauge wire and the double pole breaker, they might assume it's okay to swap that 15 A breaker for a 20 A one, which would overload my 14 gauge lighting run.

How can I clearly mark this setup in the panel so no one accidentally overloads that 14 gauge circuit down the road? Or should I just bite the bullet and run 12 gauge to the lights too? Thoughts?

Honestly, since you're already doing 12 gauge for the feeder and the outlets, the easiest and best thing to do is bite the bullet and run 12 gauge to the lights, too. It’s cheap insurance.

 

[Gotha_Prince]

No matter how good your label is, someone down the line’s gonna see #12 and throw in a 20A. Best fix is to keep the whole thing uniform at #12. If you’re dead set on keeping the #14, tag the panel with a laminated note: “15A MAX – Downstream 14AWG lighting circuit.” But I’d still just rewire it.