We are building a small (12x20") panel which is quickly running out of room. I always thought we HAD to have a 120v outlet in there but someone said it's not required? Anyone know? I would sure like to save the space.
I never heard of such a code, but I have seen it as a customer requirement for panels that contain PLC or other controls that might require the use of a laptop.
I do not believe it is a code requirement.
However
I agree with Paul it is sure handy and convenient and saves time chasing down an extension cord for a drop light or extension cord.
It also comes in real handy when you want to see if one 120V supplied component only is operating properly or take readings etc with nothing else energized.
I would label the receptacle as independent supplied and for sure identify where the breaker is. Takes one minute more on install but saves hours chasing conduit.