Section 27-3008. Public service corporations

a. Except as provided for in
  subdivision b of this section, the provisions of this chapter shall  not
  apply to:
    1.   Electrical  equipment  used  exclusively  for  the  operation  of
  railroads, railways and trackless trolleys, or
    2. Installations, including associated lighting, under  the  exclusive
  control and use of electric utilities for the purpose of communications,
  metering,    generation,   control   transformation,   transmission   or
  distribution of electric energy. Such installations shall be located  in
  buildings  used  exclusively  by utilities for such purpose, outdoors on
  property owned or leased by the utility, on public highways, streets  or
  roads  or  outdoors  on  private  property by established rights such as
  easements, or
    3. Communication  equipment  used  exclusively  for  communicating  or
  signal  purposes  provided that such equipment is installed by and under
  the exclusive control and use of communications utilities subject to the
  jurisdiction of the public service commission and is located outdoors or
  in building spaces used only for such equipment.
    b. The provisions of this chapter shall  apply  to  such  portions  of
  commercial,  industrial or office buildings owned or leased by the above
  mentioned persons or corporations, not used for the operations  of  such
  persons or corporations, such as public spaces leased or rented to other
  persons or corporations.