temperature turn on for fans

I could not edit my post. Here are the diagrams, sorry. Electrical overview Relay diagram

My links didn't work either!! Relay http://www......com/item_5635_Bosch-BRLY1.html Dual relay socket http://www......com/item_8400_Bosch-RS2-Dual-Relay-Socket.html Diodes http://www......com/item_5909_400V-1A-Micromini-Silicon-Diodes-2-per-pack-Diode1.html

only thing i would change is i dont feel comfortable running 30amps on 16 gauge. the relays will do up to 30a but you have nowhere near that kinda load. my chart says you can go up to 24 amp on 16gauge. 30 amp requires 14gauge. i would leave 16 gauge and put 20amp fuses on the relays. i could not get my browser to the website where you are looking to purchase from sorry. but the wiring is spot on.The RIGHT way is the ONLY way.

resquchas wrote: only thing i would change is i dont feel comfortable running 30amps on 16 gauge. the relays will do up to 30a but you have nowhere near that kinda load. my chart says you can go up to 24 amp on 16gauge. 30 amp requires 14gauge. i would leave 16 gauge and put 20amp fuses on the relays. i could not get my browser to the website where you are looking to purchase from sorry. but the wiring is spot on.

Great. I wil make the changes you noted. I do not know why the web address is being blocked. Where the "...." is type s o n i c e l e c t r o n i x without spaces. I think the forum is blocking due to spamming but this isn't the case. As soon as you review the hardware I am making the purchase. I can not thank you enough!

you are good to go. checked it out and you have the right gear. let me know if you need anything else. happy wiring.The RIGHT way is the ONLY way.

resquchas wrote: you are good to go. checked it out and you have the right gear. let me know if you need anything else. happy wiring.

I owe you resquchas, thank you for guiding me through this! If you are interested in what I am doing with this you can see my build log here. Have a good new year!

oldspark wrote: I call the temp switches Klixons, but that is a trade name. They are typically ~$5 or less. EG - http://www.jaycar.com.au/productView.asp?ID=ST3821 - use NO type.

I just noticed that this item is normally closed. It opens at 60 degrees. Doesn't this mean that the way I have it wired it will break the ground at 60 degrees turning the fans off?

NO. and yes. the way the relay works 87a is normal closed. 87 is when relay coil is triggered. ok....... so when the amp turns on it will ground relay 2 shutting off the power to the fans because they are wired to 87a. when st3821 is heated up and "opens its circuit" relay 2 is no longer grounded and the 87a pin will se power and voila....fans come on. aren't relays great. if you wire it like the diagram and fuse it with diodes and all you will have a reliable system. hope this clarifies. if the st3821 was the other way around...then we would switch it to pin 87. you are good to go.The RIGHT way is the ONLY way.

its a different concept that something turns OFF and turns another ON. but thats a relay for yaThe RIGHT way is the ONLY way.

resquchas wrote: its a different concept that something turns OFF and turns another ON. but thats a relay for ya

I should have studied the relay design more before I posted. I was not doubting you I was confusing myself. I have all the parts ordered (need to research and order fans) with extras. I am very excited to get this project competed! THANK YOU