Power Requirements

[dewey_dog]

I contacted shopbot about the power requirements for my Alpha control panel and they sent me the correct wiring diagram for my (older 3rd owner) tool, it was produced with/for a spindle and a router (has 3 contactors) My 1st gen PRS alpha had a 30A 110V circuit and a 40A 220 circuit to power it. In the new diagram it calls for a single 60A 220V circuit and here is where my questioning begins. The disconnect and contactors are rated at 40A and will only accept 8 gauge wire.There is only 10ga wire between the disconnect and the spindle contactor. A 60A circuit requires 6ga. wire which will be impossible to install to the disconnect. The amp draw for a 4hp spindle is 13.5A (746Watt per HP X 4 ÷220V = 13.56A) and 3 stepper drivers at 6A draw would be 18A totaling 31.5A draw even with the 2 DC power supplies this would be around 80 % draw on a 40A circuit. This does not make sense could someone shed some light on this? DD

[bleeth]

The physically easier scenario you laid out as the realistic looking option will work just fine.
This has been discussed many times in the past.

[dewey_dog]

I figured you would respond bleeth, Thanks. I take it yours ins configured similar? Now just have to buy a spindle, missed the one you bought.