control 3 exhaust fans from 5 gas sensores

Thread Starter


Joined Sep 23, 2011
what type of relays do i need to control 3 three phase exhaust fans in a parkade,with 5 gas sensors,i have a common control circuit with one switch leg from each sensor all at one central location


Joined Jul 17, 2007
We don't know what voltage or power requirements your fans have except that you mention 3-phase.

We don't know what your gas sensor output is.

Isn't "parkade" Canadian for a multilevel car parking ramp/garage?

You really need to consult a licensed electrician, as they have the knowledge and qualifications to do the job properly and safely. If wiring is done by amateurs, there very well may be fire/shock hazards created.