Section 27-961. Classification of water supplies

(a) Automatic sources of
  water supply for sprinkler systems. Automatic sources  of  water  supply
  for  sprinkler  systems  shall  include  a  gravity tank, pressure tank,
  automatic fire pump, or direct connection to the public  water  systems.
  Automatic  fire  pumps where used for sprinkler supply shall comply with
  the applicable provisions of sections 27-946 and 27-947 except  that  no
  enclosures  shall be required, and provided that when an emergency power
  system is provided, the electric power to the motor shall  be  connected
  to the emergency power source.
    (b) Auxiliary sources of water supply for sprinkler systems. Auxiliary
  sources  of  water supply for sprinkler systems shall include a manually
  actuated fire pump or siamese connection.
    (c) Combination sprinkler and standpipe tank sources of water  supply.
  Tanks  used  to provide the required primary water supply to a standpipe
  system may also be used as a supply for an automatic sprinkler system.
    (d) Nonautomatic  sources  of  water  supply  for  sprinkler  systems.
  Nonautomatic  sources  of  supply  for  sprinkler  systems shall include
  siamese connections.