power distribution colour coding

[Sonic]

Hello all

I am in the process of hooking up a Power One +/-15V / 5V linear power supply to my nascent modular synth via a CGS74 MOTM distribution board. The CGS74 has 6-pins, including (for some reason) 2 separate pins for ground on the +/-15V supply and a ground for the 5V supply.

My questions are:

1. I presume the grounds of the +/-15V and the 5V should be connected? My current plan is to use jumpers on a spare connector on the distro board. Does this sound sensible?

2. Is there a common colour coding convention for internal power cables of this kind?

Thanks,

Richard

[magman]

Hi Richard,

I would actually not connect the 15V ground to the 5V ground, as the 5V supply is often used for digital devices and you want to avoid mixing the noise from the 5V ground with the audio ground of the 15V supply.

My recollection of the Power One supplies is that the 5V supply is on it's own separate PCB, so this should be able to provide the separate ground you need.

As regards colour codes, I don't know of any. I prefer to use black wires for ground, like in a lot of other systems, but pick whatever colours you like for the rails.

Hope this helps

Regards

Magman

[prgdeltablues]

I guess as long as you settle on a colour scheme for your power and ground and stick with it, it doesn't much matter. Personally I use red for V+, black for V-, and Green for Ground, which is similar to the old UK mains coding.

Peter