You may be right.
On 6/29/2015 6:27 PM, George Skorup wrote:
There's no way I would ever use white on DC. Too dangerous when
there's AC in the same cabinet.
The best standard is to make it the same everywhere for YOUR stuff.
On 6/29/2015 5:20 PM, Adam Moffett wrote:
Ok, then I found this:
http://www.graphicproducts.com/articles/wire-color-coding.php
Which says DC with no ground is red/black.
DC with negative ground is red/white
DC with positive ground is white/black
I guess it goes to show: "the great thing about standards is there
are so many to choose from."
On 6/29/2015 5:47 PM, Mark Radabaugh wrote:
I have seen -48V done both ways - black as 0V and red as 0V. Red
as 0V seems to be more common.
Both are confusing if you are not familiar and I usually resort to
getting out a voltmeter to check before connecting anything.
Black as -48V is bad if you expect black to be at ground and not
have any potential. Red is bad as ground if your crew thinks
hooking up batteries means they should connect the + side of the
battery to the red wire. Makes for a big boom when you hook the
-48V rectifier to the +48V battery. Don’t ask how I know that.
I like Orange for -48V myself but of course we didn’t consistently
use that - so I still have to get my voltmeter out.
Mark
On Jun 29, 2015, at 5:35 PM, Adam Moffett <[email protected]> wrote:
in DC I've been doing red for positive and black for negative for
my entire life.....read that in a book when I was in elementary
school.
Do they do things differently with -48? It just occurred to me
that a different color code would be an easy way to alert people
that they're seeing positive ground.
