A functional resume puts the emphasis on the experiences you’ve managed, and the results of those experiences rather than on job titles.

If you do an internet search for “functional resume examples” you can find more information about this.

It will help in describing the capabilities you’ve already had but obviously it won’t assure anyone that you will be a great electrician since that is a specific skill that is apparently new for you. However, most people tend to assume that if you have a strong record of success in one area, you’ll build the same in another if you’ve prepared appropriately for it.