Both risers originate in the main electric room, the 2" from the FACP and the 1 1/4" from the 'house' 208 panel that is also used as a raceway for the 'house' 480 panel.
Both of these risers come up out of the slab about a foot apart in an electrical closet.
My guess is during the rough someone assumed these two risers where a 208 riser and a 480 riser and saw no problem in mixing them.
Once they started pulling wire they must have found the mistake and nippled another can on the side as the FA junction box.
I have now got the system up and running with no faults, this box remains.
We are bidding to install a 100% new FA system, it will be an addressable system in place of this 36 Zone system and will get all new conductors for both initiating and notification circuits.
As it is a building in use the old system has to be maintained operational until the new one is inspected, as a result in the end these old FA risers will be abandoned.
Bob
