kevinleaf said:OK, so I got the switcher working but didn't put it up right away because I was afraid of the backlash. Although I feel this is a totally safe way of doing this perhaps I missed a bit of electrical code somewhere. You can still fell free to tell me if I did something not safe here.
So the relay needs to be located inside of a real NEMA rated enclosure with all the proper grommets so there aren't stray wires, hot terminals that can be touched, etc.
I suspect that is #12 romex but I'd prefer to see #10, though I realize that the rules for "appliance" wiring is different than building wiring.
Not much you can about the neutral/ground since that once was acceptable.
I'd check the standby wattage on the power adapter. I think you might be surprised how much vampire draw it has. Transformer AC/DC adapters are pretty bad compared to switching power supplies. I wouldn't be surprised if that contactor had a significant power draw as well so you'd want it spend most of its time off.
I admit I had to look this up but http://grammarist.com/usage/drier-dryer/" onclick="window.open(this.href);return false;
I wonder how many times a relay like that can be switched off under load? I have no idea what kind of ratings they'd have.
I don't really think it's a good idea to kill the power to your car. I'm not sure if this was ever confirmed or if it has been fixed so do your own research but it's my understanding this was causing diodes to fail which required replacing the entire onboard charger.
If you decide to put it in a box and would like some 10-2 romex let me know.