The provisions of this chapter shall not be construed as applying to, nor shall they apply to:

    1. Construction, reconstruction, operation or maintenance of any high-voltage overhead line, supporting structure or appurtenances for the support or operation of a high-voltage overhead line by persons authorized by the owner or operator or his employees; nor

    2. Work being done on telephone or communication circuits or their supporting structures; nor

    3. The operation or maintenance of any equipment traveling or moving upon fixed rails. (Ord. S-29555, 1976).