Bill: There are standards for electrical prints, I only see "schematics" in appliances and other small devices. They are never used in any large scale electrical blueprints. In fact they could not be used beyond a few components or it would be unreadable. A ladder diagram is easy to read and has all the information to follow the S.O.O. (sequence of operations) without which it would quickly become a giant headache. It also can go on for page after page which is not necessary for small equipment but still would make a heck of a difference in understanding a circuit. When I used to do HVAC schematics were all we had and it was hell whenever it got beyond a few components and interconnects. When I got into my electricians apprenticeship and saw my first ladder diagrams, single line, three line, etc it was a giant breath of fresh air. They are the standard for all electric blueprints and should be adopted by all.