"Engineer is lazy" Smart brains find smart software to get the job done. Some great links down below offer great one line diagram software with full function of load calculations,voltage drop calculation,conduit,cable sizing,panels and integrated one line diagram follow NEC. Short description from electrical one line diagram vendor as the following:
"Start building one line diagram by inserting devices on the drawing. The insertion dialog has a list of one line devices and equipment connections on the left and a list of blocks on the right. Listing the equipment connections on the left allows you to insert large motor loads on the one line.
Before starting our implementation of this feature, we collected samples of one lines from our customers. We quickly learned that there is no such thing as a standard one line. As a result, we decided to make customization of the graphics a priority. All of the graphics are based upon block definitions. You can add, remove, and modify blocks in the list. The process is simple enough that if you discover in the middle of a project that you are missing a block that you need, you can take a quick moment, create it, and continue on with your design." design master
