The provisions of NRS 455.220 and 455.230 are not applicable to:
1. An employee of a public utility which produces, transmits or delivers electricity, or a public utility which provides communication services, while the employee, in the course of his or her employment, constructs, modifies, operates or maintains:
(a) Electrical systems;
(b) Communication systems; or
(c) Overhead electrical or communication circuits or conductors, or the structures supporting them.
2. An employee of a video service provider operating pursuant to chapter 711 of NRS or a business which provides communication services, while the employee, acting within the scope of his or her employment, is making service attachments to the structure supporting an overhead line carrying high voltage, if authorized to do so by the public utility operating the overhead line.