There are many opinions about this.
-48 seems to be red in many installations with black being return.
Just this morning, I was in a telco installation that had the red as the
return and black as the -48.
I prefer to have -48 as blue and black as return but that is a very old
Automatic Electric standard.
What does red mean to you:
Hot
-or-
Positive
Because in a -48 system, hot is -48 and return is positive.
-----Original Message-----
From: Adam Moffett
Sent: Monday, June 29, 2015 3:35 PM
To: [email protected]
Subject: [AFMUG] wire color standards
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.
