Careful, I think we have 2 questions here. First was I think for the building wiring.
Q below is for a "system". What kind of system? If an industrial machine, EN 60204 series, already mentioned, is applicable. If some other kind of system, there may be other requirements. (If none, only then I might use wiring regs or 60204 as guidance.) Most of the colours mentioned below such as yellow or orange have special meanings in some stds. Using black for ground seems a bad idea. Is it really ground, or just the 0V / return? Glyn Garside From: John Cochran <[email protected]> Sent: Wednesday, December 16, 2009 8:04 AM To: [email protected] Subject: Re: [PSES] Cable colours for DC wiring I would like to know this also, as I can find no definite standard for DC wire colors in Europe or US. We did have one system evaluated in Denmark, and they insisted that the +24VDC wire be blue and its return be white. I tend to go with the colors used with ATX power supplies: +5V=red, +12V=yellow, +3.3V=orange, -12V=blue, ground=black. Thanks, John Cochran Strongarm Designs From: [email protected] [mailto:[email protected]] On Behalf Of [email protected] Sent: Wednesday, December 16, 2009 9:25 AM To: [email protected] Subject: Re: Cable colours for DC wiring It is my understanding that there is no standard for colours except for safety and earth ground type connections being reserved with greens, yellow bands, etc. However, my preference from working in PC power supplies has always been +12,15V red, return red/black +5V orange, return orange/black gnd, black -5v blue, return blue/black -12,15v purple, return purple/black Then all the signal lines were leftover colours. [The entire original message is not included] - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <[email protected]> All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc Graphics (in well-used formats), large files, etc. can be posted to that URL. Website: http://www.ieee-pses.org/ Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <[email protected]> Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher: <[email protected]> David Heald: <[email protected]>
