[TCML] OT: Any oneknow any foreign wiring color code / voltage
william_b_noble at msn.com
Wed Jun 23 14:28:57 MDT 2010
generally I think european standards can help -
green with yellow stripe is safety ground
brown is often ground in DC systems, neutral in AC
there may be an IEC standard
> Date: Tue, 22 Jun 2010 23:15:31 -0400
> From: Dave at davidspeckmd.org
> To: tesla at pupman.com
> Subject: [TCML] OT: Any oneknow any foreign wiring color code / voltage polarity standards?
> As a general rule, for American designed and built devices, once upon a
> time, you could assume that wires colored:
> White, brown, red, orange, and yellow were for positive voltages.
> Green was ground.
> Black, blue, violet and gray were for negative voltages.
> Black is "hot" and white "neutral" for power conductors, with green as
> earth ground.
> I know that there were exceptions, and no hard and fast or official
> rules, but in my experience, those color assignments applied 90% of the
> In items imported from Asia, the color codes are all screwy (by American
> standards). I have on my bench a LED display device that has gray and
> violet wires for power, and yellow and blue wires for signals. (with an
> additional gray and violet pair bundled in for power). You also see
> cables with pink and tan conductors. Similar color groupings show up in
> VCRs and DVD players.
> I've found various tables of color sequences that do not match the
> conventional US resistor code sequence. Tan and pink show up as numbers
> 11 and 12 in some of the sequences.
> My question:
> Is anyone aware of any convention as to the assignment of positive and
> negative voltages to the wire colors used in Asian electronics?
> Thanks in advance,
> Tesla mailing list
> Tesla at pupman.com
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