Tom Jenkins said:In the US the only regulated colors are:
White or Grey = Neutral or grounded current carrying conductor
Green or Green/Yellow stripe = ground
Any other color = current carrying conductor
Thanks, JTN ...jtn said:UL-508A Manual section 66.9 gives a color code for internal control wiring.
It can be tough to find stuff in there if you don't read it regularly. Our shop supervisor was the 508A guru, I know enough to be able to spot discrepancies in the specs so I can call them out in submittals.RBergmann said:Thanks, JTN ...
I'm glad that I have someone else at my company that has to deal with this on a regular basis. When I searched the PDF of the 508A standard, I couldn't come up with the color requirements (obviously, wrong search terms) but your direction was all I needed to see the error of my assumptions.
... rab
GEOFRA said:See attached file for EU standards.
The only weak point I see is the use of blue color as AC neutral and DC 0V which is confusing.
I dont think thats for control panels its for Installation Cables.
Kidblue said:Think you'll find it now affects panel wiring too!! (It was a surprise to me as well! )
We changed over about 9 months ago......
I believe that is the convention for grounded DC, ungrounded is red and black.tom_stalcup said:The panels we get from overseas(germany) come with +24 being blue.... And -24 being blue with a white stripe....