(1) The construction, installation, operation, repair, or maintenance of electrical installations that are used by a public utility in rendering its authorized service; nor to the installation, operation, repair, and wiring associated with telecommunication services and equipment used for the transmission of information by electricity regardless of the location of such electrical installations, equipment, or facilities.

(2) Electrical installations in ships, pipeline systems, railway rolling stock, automotive equipment, or portable sound equipment.

(3) The manufacture, testing, or repair of electrical equipment in the plant of the manufacturer of the equipment.

(4) The construction, repairs, or maintenance of buildings used exclusively for agricultural purposes on owner-occupied farms. (Added 1969, No. 284 (Adj. Sess.), § 3; amended 1983, No. 146 (Adj. Sess.), § 1, eff. April 11, 1984; 1987, No. 274 (Adj. Sess.), § 2.)