Elk EZ8 two wire smoke detectors. All runs on zone 8?

[theedudenator]

I have 3 sets of daisy chained 2 wire smoke detectors.
 
I would just tie all these to zone 8 and they would act like one zone?
I need to add a resistor?

 

[Del91574]

You need to have 4 conductors for each run. 2 send, 2 return.
 
If not, you're going to need to address your wiring, your detectors or buy additional equipment (fire loop wired incorrectly)
 
You can't parallel fire devices or zone wiring.

 

[theedudenator]

If I have two doors with two contacts can I put them on one zone?
If either door was opened it would trip the alarm?
 
I am not understanding my firewiring.
I have a few leads with 2 wires each.
Maybe this is the loop I am seeing?

 

[Del91574]

If you have multiple 2 conductor feeds for a fire alarm, it is wired incorrectly to be used as a loop.
 
A 2 wire fire alarm, home run, would require 4 conductors at each detector except the last one.
 
Burglar alarm devices are wired in series. Fire alarm is wired as a daisy chain, from detector to detector with the detectors wired "across" the conductor pairs with the EOLR installed at the last unit in the chain.
 
You can series contacts, fire alarm can't be wired that way.

 

[theedudenator]

I have 3 sets of fire rated red wire.
 
One set of wires has a resistance of 2200
And if I apply 12v I can see 12v at the smoke detector.
So I think this is my wire for my upstairs fire alarms.
Since it is 2200 ohm I can connect direct to Zone 8 of my Elk panel (EZ8)
 
I have 2 other sets of red wire.
If I apply 12v on one set, none of the fire alarms show voltage.
But the other set of red wire has voltage.
These 2 sets appear to be connected.
And per my notes, one of the sets was connected to Aux voltage.

 

[theedudenator]

I need a 820 resitor.
Added that to the last fire alarm.
Connected to Zone 8 as a Fire Alarm.
Voltage is reading 12.3v
And shows ok.
 
Now I need to test the fire alarms?

 

[theedudenator]

My other two sets of wires have a small amount of voltage.  .1 volts or less.
When I shut my panel down they still show the same voltage.
 
They are the red fire rated wire.
Could these possibly tied to the phone system?

 

[theedudenator]

I was actually able to trace the other two wires.
The basement was finished a few years after the house.
There are 3 AC powered firealarms.
The 2 sets of wires tie into one of these units and the rest are chained together.
 
Is it typical to supply panel power to an AC fire?
I am assuming the other would be treated like a zone?

 

[Del91574]

Poor installation and practices. I would not tie to them, typically a code concern unless special circumstances are considered and special detectors installed, which is usually doubtful the components were installed.
 
Plenty of reading why you should NOT do this out there, both on the forum and on the web.