Fire Alarm Class A Wiring Diagram. Basically when the fire alarm panel detects an open wire in the class a loop it automatically switches to using two separate un supervised class b loops. Fs1004 factory configured with 10 class b idcs and four class b nacs.
Wiring diagrams provided herein are for information and reference only and. Reliability the nfpa wants to make sure the fire alarm system continues to work in the long run. What s the difference between conventional class a and b how does fire alarm wiring work free pdf diagram module e part 1 electrical exam prep canada wire contractor magazine circuit design control units ppt online is piping loop mike holt forum addressable alarms canadian consulting engineer jules bartow communications security in vein basics 2.
Addressable fire alarms systems typical wiring diagram.
A smoke or heat detector can be installed to the existing or new home wiring. The first one is the original class a loop and second one back feeds on the separate pair of wires to make the second class b loopmost of the devices on the original class a loop will be on either the first or the second. Fire alarm security access control cctv. As far as im able to tell the only help the plan or riser diagram would offer is whether there is a redundant path such as for class a.