1. Buildings owned by the Federal Government.

2. Installation, alteration or repair of electrical equipment and devices by municipalities for street lighting or traffic signal systems.

3. Vehicles, boats or airplanes.

4. Integral parts of communications systems of telephone or telegraph companies.

5. Communications systems of railroads or pipeline companies, or oil or gas producers.

6. Public utilities systems subject to the regulations of the Corporation Commission and Rural Electric Cooperatives in the generation, transmission and distribution of electricity.

7. Persons performing electrical work on integral components of equipment for which they have been otherwise qualified by examination of other competent bodies.

8. Any person engaged only in the work of operating any of the electrical installation in a factory, refinery, office building, school district, institution of higher learning, hospital or eleemosynary institution or any facility thereof; provided he shall be hired by only one entity and shall not establish an electrical business nor be able to assume any electrical contracting functions.

9. Elevator construction contractors and/or elevator construction journeymen in those jurisdictions of the city, county or metropolitan area which otherwise provides for licensing and inspection thereof by separate ordinance or resolution, and authority to so exempt and establish such licensing and inspection code by such enactment is hereby granted to such government entities.