So I know what it is, but what about this:
120vac motor bell switched by a DPST waterflow switch from a sprinkler system, it's not a supervised circuit. The bell is to notify the arriving FD water is flowing, not just a general alarm. There is a complete fire alarm system. The other side of the switch is monitored by the FACP. Very normal situation.
Now take that same bell and make it a 24vdc bell. The bell receives it's power from the FACP aux power supply through an addressable relay module that is mapped(programmed) to activate upon any waterflow condition. The wiring to the bell is not supervised. Is that a NAC and should it be supervised?
If the 120 VAC circuit isn't then just because the power is derived from the FACP does that trigger the supervision requirement?
What about a specfically coloered strobe located outside in place of the 24v bell?
I'm believe it does, but since the 120v doesn't, it's confusing to some. Maybe I'm wrong, what do you think?
Also, most plans I have show these devices off a relay, no one seems to care, but I may have to defend my position, if I challenge this. I'm not looking for a fight, whatever is right, is right.
120vac motor bell switched by a DPST waterflow switch from a sprinkler system, it's not a supervised circuit. The bell is to notify the arriving FD water is flowing, not just a general alarm. There is a complete fire alarm system. The other side of the switch is monitored by the FACP. Very normal situation.
Now take that same bell and make it a 24vdc bell. The bell receives it's power from the FACP aux power supply through an addressable relay module that is mapped(programmed) to activate upon any waterflow condition. The wiring to the bell is not supervised. Is that a NAC and should it be supervised?
If the 120 VAC circuit isn't then just because the power is derived from the FACP does that trigger the supervision requirement?
What about a specfically coloered strobe located outside in place of the 24v bell?
I'm believe it does, but since the 120v doesn't, it's confusing to some. Maybe I'm wrong, what do you think?
Also, most plans I have show these devices off a relay, no one seems to care, but I may have to defend my position, if I challenge this. I'm not looking for a fight, whatever is right, is right.