[GreenKeys] Polar Loop wiring?

[Sam Hallas]

Brooke Clarke wrote:
> In a conventional Neutral loop you can just wire a series of machines 
> all in series.  The idle machines look like shorts and pass the loop 
> current.  When any machine sends all the others see the signal.
> But how do you wire a Polar loop?
>
It's just the same with a polar loop, Brooke. You wire all the machines 
in series and the last one goes to ground. It's the tongue in the 
sending machine that's different. Instead of just being on and off,  
it's a changeover going from positive to negative.

Cheers,
Sam