Wiring diagram schematics

[Sruk]

Greets! 

Currently I'm trying to solve a big problem regarding the way of how to put a wiring diagram together.

By the term 'wiring design' I'm thinking on the electrical schematics that connect few or many enclosed devices inside the same cabinet. This also relates to the in between cabinet connection. Although I do know how to draw and design electrical schematic (for electronics & PCB) I have some doubts about doing the same for wiring design.

Anyways, this kind of work is done by the SW tool called ePLAN Electrical. I'm sure many of You have heard of.
This is one of many examples:



My questions here are:
- where from to learn how to draw technically correct wiring diagrams
- some dedicated literature
- are there some examples (.PDF) that one could study how it was done
- can someone who has done something similar share a thought on this issue
?

To start with, ePLAN tutorials are available and that's a great help.

Thx

[Zero999]

That looks good to me.

I've done that kind of thing before, for my job and I hated it.

I've used AutoCAD electrical and Zuken E3 (not to be confused with the electronics PCB program) and found them both a pain.

[SL4P]

Where possible - but the objective is clear and readable --
Voltages highest to lowest == top to bottom.
Signal flow input to outputs == left to right.

Easy.

Everything beyond this is eye-candy and extra time spent.
Well worth it when the design is cast in stone, but get the circuit right first then dress it up when there's no pressure.