I have always used breaker lock's, there cheap and you don't have a switch that most home owner's don't have a clue what it goes to.
I hope i haven't stepped over my "apprentice" line here.
In my travels I've seen unprotected UF from the disconnect to the unit. but it isn't allowed around here. I use flex and UF (or THW) from the unit to the disconnect.
because it's not protected. and looks like anyway. just because it's allowed does not mean u should do it. If someone said jump off a bridge would you do it? :yes: Then use UF. :laughing:Why there is a problem with this anywhere else, I'll never know. :whistling2: