Re: Is ground the same thing as the black wire in DC?
From: Allan Herriman (allan.herriman.hates.spam_at_ctam.com.au.invalid)
Date: 07/26/04
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Date: Mon, 26 Jul 2004 14:13:03 +1000
On Mon, 26 Jul 2004 13:52:52 +1000, Allan Herriman
<allan.herriman.hates.spam@ctam.com.au.invalid> wrote:
>On Sat, 24 Jul 2004 09:50:37 GMT, Robert Baer
><robertbaer@earthlink.net> wrote:
>
>[snip]
>> The color of a wire is merely a matter of convenience and one should
>>never depend on a given color to have any particular meaning or use.
>
>I'm sure the electrons don't care, but in many applications there are
>*laws* regarding the colours of wire.
>Still, as you say, it is prudent not to make assumptions, particularly
>where safety is concerned.
... particularly in -48V DC systems, where red is sometimes used for
ground and black is used for -48V. I've also seen the reverse: black
used for ground and red for -48V. Check your local regulations, then
measure it with a multimeter just to make sure.
Regards,
Allan.
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