hi,
which kind of industrial conductors do you mean? 120/230V or low voltage?
for 230V, here the minimum is 0,75mm² = right between AWG 18 and 20, so you should use 18. this is allowed to be fused at 16 Amps for short distances in controlling cabinets and power panels (dont have the exact lenght in mind, i guess it was 1,5 meters, 5 feet?).
for 24V, you can go as small as you want if you proper fuse it. I do a lot of work on 24V with inductive sensors and so on, and these are colored:
Brown =24v,
Blue =0V,
Black=Signal.
We only use cad programs to make new schematics, but i dont work on them. all i can do in this area is making PCBs on eagle.
whats about the ladder logic? i dont know anything about that system or what it looks like. could you link me any image of that?
do you mean a schematic for industrial control, or one for microelectronics?
good night (its 2:50 am here now...)
andy
