This chapter does not apply to:

1. (a) Any employee of a service dealer while the employee is engaged in activities within the normal scope of the employer’s business.
2. (b) The repair, service, or maintenance of equipment used in commercial, nonresidential, industrial, or governmental establishments.
3. (c) The repair, services, or maintenance of equipment the ordinary and usual use of which requires a license or permit issued by the Federal Communications Commission.
4. (d) Any person licensed under Chapter 9 (commencing with Section 7000) as an electrical contractor (C-10) or a low-voltage communications systems contractor (C-7) and acting within the scope of their license.