120VAC Relay for Water Circuit Breaker

3799 Views 4 Replies 3 Participants Last post by soundgy, Jul 13, 2010

soundgy

Discussion Starter · #1 · Jul 13, 2010

Hey guys, first post in this forum. I don't normally post in forums, but I really don't know where else to get help for my electrical build. I am designing and building my own water circuit breaker that is tripped when a leak is detected. When a water sensor is tripped, it cuts off the electricity to any equipment plugged in. I will try and post a paint picture for anyone who wants to see the design. Here is my problem. I need a 120v 10-15 Amp relay with a 12V coil. The trigger is a constant supply of 12VDC going into the coil, until water is detected, then the 12v is shut off. Which then should cut off the 120VAC supply. So essentially what I need as a 120v 10-15Amp SPDT/SPST relay with a 12V coil that is normally open. I have looked on electronic sites and I can't figure out the part naming scheme. If anyone on here has any experience with relays, I could really use the help. Thanks!

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DarkCobra

· Registered

Joined Jun 22, 2004

3,350 Posts

#4 · Jul 13, 2010

SPST normally open relay, 12VDC coil, contacts rated 10A @ 120VAC, $1.10/each:

http://www.allelectronics.com/make-a-store/item/RLY-531/12VDC-SPST-N.O.-RELAY/1.html

Of course, there are many other relays and suppliers. Let me know if you need something else.