How to read an electrical floor plan drawing - is easy, when you know how. It takes a knack to be able to read drawings of floor plans, especially electrical floor plans, since there's all these numbers & symbols on them. Not sure of what everything means, on an electrical floor plan drawing? Don't guess at it as it's not a wise move to make assumptions when it comes to reading drawings of electrical floor plans.
You might have to get your magnifying glass out or squint since there's so many small details on an electrical floor plan drawing...but stick with it & review, review, take notes, & more review, & it will become clear. That's why lots of people decide they'll leave this up to the pros, because it takes some effort on reading electrical floor plan drawings.