§ 30-128. Scope.

This article shall apply to the installation and alteration of wiring for electric light, heat or power and signal systems operating on 50 volts or more but shall not apply to the electrical installations in ships, railway cars, automotive equipment or the installations or equipment employed by a railway, electrical or communication utility in the exercise of its function as a utility and located outdoors or in buildings used exclusively for that purpose nor to any work involved in the manufacture, assembly, test or repair of electrical machinery, apparatus, materials and equipment by any person engaged in electrical manufacturing as his principal business.