Hi Everyone.


I was asked the other day, by a fellow developer, if there are any standards when it comes to colouring in schematic or block diagrams that are used in training. I have never come across anything myself in either the military or civilian sector but I wondered if anyone else had? I normally use red, blue/black and green for electrical cables but have never really considered any others.


If you have any useful info on this one then please post it here as I am sure it will be useful to everyone.


Many Thanks,



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Replies to This Discussion

Hi Richard,


I normally use black for Oxygen lines and Yellow for Gas lines.  I have used the following as a guide for Hydraulic charts.  It's very basic but a guide nontheless.






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