Solar-Powered,
Re: "So, are you saying that, in your jurisdiction, electrical rooms are completely prohibited in residential property?"
Occasionally, we do see an electrical room or closet that we will allow, but it is either accessed from the exterior, or it is a dedicated room for electrical, or elec. and mechanical, that really provides no space for other storage.
The basic question we ask ourselves is: Is the homeowner LIKELY to use it as a clothes closet? If it's within the residence, most of the time, "yes" is the answer.