Does DeltaCAD offer electrical symbols to draft up electrical schematics?
No, the software doesn't offer electrical symbols. I have installed the demo package, but no information about electrical symbols could be found.
To test the application, download the software from the official website: https://www.deltacad.com/demo.html
Secondly, use a capable application that was designed for this type of jobs: http://www.electronics-lab.com/downloads/schematic/013/