Forum Discussion
Heisenberg
Aug 29, 2013Explorer
In the left diagram the coil is 85 and 86 which is a hot and a ground. It sees power with key on. 30 and 87a is the coil de-energized position of the relay, the switch is closed. 30 would be power from the breaker and 87a runs to the tv. When the coil sees 12vdc the switch pulls over to 87 which in your case goes nowhere, in the real world it could send 30 to an indicator light saying TV off.
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