Would NEC 250.104 apply?
250.104 Bonding of Piping Systems and Exposed Structural Steel.
(A) Metal Water Piping. The metal water piping system shall be bonded as required in (1), (2), (3), or (4) of this section....
(1) General. Metal water piping system(s) installed in or attached to a building or structure shall be bonded...
(2) Buildings of Multiple Occupancy...
(3) Multiple Buildings or Structures Supplied from a Common Service...
(4) Separately Derived Systems...
[This message has been edited by ThinkGood (edited 08-13-2003).]
