These rules cover supply and communication lines@ equipment@ and associated work practices employed by an electric supply@ communication@ railway@ or similar utility in the exercise of its function as a utility. They cover similar systems under the control of qualified persons@ such as those associated with an industrial complex or utility interactive system.The National Electrical Safety Code (NESC) covers utility facilities and functions from the point of generation by the utility@ or delivery from another entity@ of electricity or communications signals through the utility system to the point of delivery to a customerapos;s facilities.NESC rules do not cover installations in mines@ ships@ railway rolling equipment@ aircraft@ or automotive equipment@ or utilization wiring except as covered in Parts 1 and 3.