using the interlok wire on a smoke detector
using the interlok wire on a smoke detector
(OP)
I am required to turn off a fan that feeds fresh air to acouple of rooms. The rooms are finished and surface wiring isn't an option. If I could use the interlok wire that interloks a regular smoke detector together that would be the simplest but was unable to find what signal they us to turn each other on??? I get about 10VDC out of it when it's alarming but doesn't turn on a relay. I then looked at amperage but came up empty. This isn't for live saving purposes it's just to turn off a fan so it doesn't feed a fire.





RE: using the interlok wire on a smoke detector
Dan - Owner

http://www.Hi-TecDesigns.com
RE: using the interlok wire on a smoke detector
This 'special relay' was purchased from the electrical supply house that sold me the smoke alarms. In the event that you can't find such a relay for your particular brand and model of smoke alarms, then it isn't really the end of the world to replace the smoke alarms as well (assuming that they're the normal $10 variety).
You'll still need to be lucky because you'll need the 14-3 wire to not just run between the smoke alarms, but also back to the panel (for example) where you could install the relay. Most of the time they'll have installed 14-2 to the first detector, and then 14-3 the rest of the way.
PS: Reading between the lines, I assume that this isn't a 'home owner' question.
RE: using the interlok wire on a smoke detector
But for your application, you might have to have the 'special relay' control another relay to kill the circuit. Or use those (rarely used) circuit breakers that have a low voltage control line.
RE: using the interlok wire on a smoke detector
I suggest you post a more detailed question, including the building occupancy in the NFPA Code Issues forum on this site.
This is a situation where the legal/code issues trump any clever engineering solutions.
RE: using the interlok wire on a smoke detector
RE: using the interlok wire on a smoke detector
RE: using the interlok wire on a smoke detector
Don Phillips
http://worthingtonengineering.com
RE: using the interlok wire on a smoke detector
Obviously we don't have the details, but on the surface it sounds old-school.
RE: using the interlok wire on a smoke detector
Don Phillips
http://worthingtonengineering.com
RE: using the interlok wire on a smoke detector