I am wiring a siding and I would like to have lights on my control panel such that the green light is on when powered and the red when unpowered. But how do I light the red light in the absence of power?
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Well, if you have a switch on the panel controlling power to the siding, use a SPDT switch and wire the red light to the off side of the switch. If it's controlled remotely, or from multiple places, I'd probably use a relay and wire the indicator lights to each side of the set of contacts.
Again my ignorance shows....what kind of relay and where can I get one. John, watch for the Press Release as I will be naming you the Senior Electrical Engineer on my RR. The pay pales in comparison to the prestige of the position. In time we will try and get you a company car....scale yet to be determined. Thank you.
Shown here using LEDs but you could use light bulbs also as indicator lights.
http://www.jcstudiosinc.com/BlogShowThread?id=635&categoryId=
You can buy relays in a lot of places. If you get stuck I have some extras I will sell at my cost.
if you do not want to use relays,just use DPDT toggle switches,the wiring is similar to that shown with the relay contacts except use all 3 contacts of one set for red or green LEDs or bulbs. .
Dale H
