flatlander
Senior Member
- Location
- Diamond bar, CA , Tempe AZ
Have a project in a high rise apartment parking garage trouble shooting the exhaust fan control that evaluates the fumes from cars.
In doing so it was found that the siren circuit which is powered by the 120 volt breaker that feeds the fan motors. Furthermore the 120 volt siren is wired with Cl2 -Cl3 low voltage wire. Then to top it off it was run in the same conduit as the Gas sensors. The siren only operates in a event. It is my understanding this is Class 2 wiring. The sensors are DC.
I believe the code at the time was either 1996 or 1999 NEC.
I don't seem to find anything in the book that allows this.
SECTION 725?
Any knowledge would certainly be appreciated.
In doing so it was found that the siren circuit which is powered by the 120 volt breaker that feeds the fan motors. Furthermore the 120 volt siren is wired with Cl2 -Cl3 low voltage wire. Then to top it off it was run in the same conduit as the Gas sensors. The siren only operates in a event. It is my understanding this is Class 2 wiring. The sensors are DC.
I believe the code at the time was either 1996 or 1999 NEC.
I don't seem to find anything in the book that allows this.
SECTION 725?
Any knowledge would certainly be appreciated.