Re: Contactor questions

>>Since each 
>>contactor has two relays and each relay has three contacts, does 
>>this mean that I could wire everything up in parallel and be good to 
>>go for up to 3 * 2 * 27A, or is the 27A rating for each relay rather than 
>> each contact?
>     Yes.

This was a multiple-choice question, but I am assuming that you meant 
"Yes, you can run 162A through this puppy by paralleling all the 
contacts".  If I'm wrong, please let me know before I burn my house 

> If you can guarantee which is neutral and hot in your 120V wiring, 
> parallel all the contacts on the hot.  Of course, use separate contacts 
> for 220V connection.

I have decided to run both lines through the relay regardless of what's 
hot or not.  That way, I won't have to worry about anything and I will still 
be able to safely switch 81A...more current than I'm going to be able to 
safely suck out of my 50A wall socket anyway.  I will also be able to get 
120V from the 240V outlet by only using one hot side.

Steven Roys (sroys-at-radiology.ab.umd.edu)