Thanks for all the comments so far, seems that if there is a standard its not well known, as nobody here or in my company has seen it. A lot of the replies mention 'left and right' but in my experience DIN rail nearly always runs horizontally so terminals are top and bottom, it then depends...
Anyone know if there is a European standard that dictates the direction that a wire identification number should read? ie toward or away from the terminal its connecting to?
I've always applied the numbers so that they read AWAY from the terminal, now I'm hearing that a european standard...
Thanks for the reply, I agree with you about DC outputs from Inverter Drives etc, they should be in black, but for the time being I think I'll carry on wiring the +24V supplies etc in blue.
EN60204 recommends the following wiring colours...
- BLACK: a.c. and d.c. power circuits;
– RED: a.c. control circuits;
– BLUE: d.c. control circuits;
– ORANGE: interlock control circuits supplied from an external power source.
...but no clarification as to what constitutes a 'dc power...