John1.....
With all of your novice questions on the matter, something else has come to mind, especially since you have no idea of what you're doing in this area...............
Do you have the right kind of insurance to even be playing in an electrical box ??
Have you ever told your carrier that you intend to go up on a ladder into the air and work on electrical signs ?? When refurbishing an electric box, you still need the proper insurance. See, if there is a bare wire, something shorting out or a raceway that has become undone, you need to be able to report it and fix it so no one gets hurt down the line.
Do you also know how to pull a permit for this type of work ?? Any work of this nature must be accompanied by a permit explaining to the municipality where this is to take place, that you know what you're doing and should anything go wrong... you will be held 100% liable for whatever that situation might be. In other words, you are taking the municipality off the hook should something go wrong. Generally, you need 2 million to 3 million in liability. Without that, you are illegal doing anything on this job.
You wanna start somewhere... I will never get into these types of jobs if i don't make myself familiar with what's needed for them. .... start at the beginning. Learn what you want to do first, before you kill somebody.