Control panel wire gauge question?

[JAZZCNC]

Thanks, I think i over think things to much, just one query what advantage is the latching relay over just running the 24v circuit through the contactor dc coil?

Well think about just what would happen if you just wired 24V direct thru the E-stop to contactor with nothing else between.!! . . . . . Yes machine would stop when pressed but what would happen when E-stop released and contactor turns back on.?? . . . . . . . . . . . . . . . . Argh crash bang whollop when machine instantly takes off again with no idea where it is or where it's going.!

Yep the drives would turn on and motors would setoff again and because you didn't inform control software E-stop happened then instantly machine would carry on but now with no idea where it is.!!

The whole point of the Latching safety system is to allow a controlled Stop and Safe Re-start.