As you are probably already aware the collection of wire styles in SOLIDWORKS Electrical is stored at a project level, not the application level. This makes the reuse of a custom wire style challenging at times if you must copy from one project to another on a regular basis. If you need to do it more than twice it should be updated in your templates.
SOLIDWORKS Electrical Content Portal (ECP) hosts a multitude of resources that are highly beneficial to the electrical designer who wants to utilize specific manufacturer parts and symbols in their designs. SOLIDWORKS Electrical comes with a large library of very common symbols, manufacturer parts, title blocks, and cables that are available upon installation and download, but the ECP can provide your library with a tremendous amount more.