matt_i
Well-known member
Just trying to make sure I understand the circuit correctly.
I am talking about 3 wire 120vac smoke alarms and strobes.
What I think happens is that all the orange wires (3rd wire, probably hooked to red in a 14-3 NMB wire) are connected to each other just like hot and neutral.
So if any alarm goes off, there's some type of internal relay contact which then connects black and orange/red so now the orange/red has 120vac potential to neutral.
All other alarms & strobes, now sensing the 120vac presence on orange/red, but not being actually "tripped" will also alarm.
So to turn off the now-sounding alarm group, the unit which originally sensed the problem and closed its contact has to revert to the original normally open state and then all sounds stop.
Thanks for clarifying or correcting me, just want to make sure I understand the wiring when researching to purchase units.
I am talking about 3 wire 120vac smoke alarms and strobes.
What I think happens is that all the orange wires (3rd wire, probably hooked to red in a 14-3 NMB wire) are connected to each other just like hot and neutral.
So if any alarm goes off, there's some type of internal relay contact which then connects black and orange/red so now the orange/red has 120vac potential to neutral.
All other alarms & strobes, now sensing the 120vac presence on orange/red, but not being actually "tripped" will also alarm.
So to turn off the now-sounding alarm group, the unit which originally sensed the problem and closed its contact has to revert to the original normally open state and then all sounds stop.
Thanks for clarifying or correcting me, just want to make sure I understand the wiring when researching to purchase units.
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