Wiring Question

[IncrdblHulk7]

I am in the process of wiring up my modular CP.  

I have all of my IPAC inputs wired up through a DB37 wire.  I plan on hooking it up through a DB37 Data Switch - so that (if I get around to building it) I can switch between MamePC and consoles with the flick of a single switch.  

I also have a OptiPac as part of my modular panel.  My controls require me to have GND, 5V, and 12V running to some of the CP components.  

When switching from MamePC to console - I will need to switch the GND and 5V to that of the PC or console selected.  This is where I am having trouble ...

1) Is it OK to run the GND, 5V, and 12V supplies through the DB37 26gauge wires?  I have 9 spare wires on the DB37 cable (after Ipac Inputs)

2) Am I correct  that I will need to switch the MamePC Power wires to console when switching?  I cant leave them simulanteously supplying power - right???

3) Solution idea:  (9 remaining wires on DB37) 2xGND#1 2xGND#2 2x5V#1 2x5V#2 1x12V
The #1 set would supply the Ipac controls and the #2 would control the OptiPac and Lighting.  When using MamePC - I would have the PC GND feeding both GNDs , both 5Vs, and 12V.  When using console - I would only use GND#1 and 5V#1 - so that only Ipac style consoles would work with console - and therefore the  Optipac controls and Lighting lighting would be turned off.  Can this wire layout (in 26 gauge wire) support the power throughput???

P360 - 5V & GND
TB&Spinner - 5V & GND (& 12V TB illumination)
CoinDoor - 12V & GND
Buttons and other Joysticks - GND

Sorry for such a long message - hopefully someone will understand my question.

[EricB]

It really depends on your current load.  26 gauge wire has a very low current carrying capability....like 0.3 amps.  I wouldn't recommend running lights, etc. off of that wire.  The voltages are no problem...it's the amperage that always gets you.