[GreenKeys] Color Codes??

[Doug Alderdice]

Since it's for 48 VDC could it be something to do with the telephone 
standard of a positive ground?  Seems like I just read something the other 
day about this but can't recall where I saw it to look it up.  I think the 
explanation was that black is ground, regardless of polarity.

Any former Telco folks want to confirm or deny this?

73,

Doug, KA2WFT


At 06:59 PM 8/23/2004, Bob Camp wrote:
>Hi
>
>That would be a really strange setup. The world that I live in seems to 
>have pretty much standardized on red positive / black negative. I would 
>think that you would get in trouble reversing something like that.
>
>         Take Care!
>
>                 Bob Camp
>                 KB8TQ
>
>
>On Aug 23, 2004, at 4:24 PM, wa2hwj at att.net wrote:
>
>>Has anyone ever seen a 48VDC color code that labels the positive as
>>BLACK and the negative as RED?  I seem to recall that RED is always
>>positive.
>>
>>Jack WA2HWJ
>>
>>NNNN