ECN Forum Forums General Topics of the Trade General Discussion Area Voltage color I.D.

I seem to vaguely remember one of the 70's editions of the Code having a color code requirement. That's when engineers began specifying the Br/Or/YL for 480V circuits and Blk/Rd/Blu for 208V circuits. And the phasing was to following throughout. Maybe it was the 72 Code?? And a lot of specifications still have that requirement, because mangagement didn't want to spend the money to get them updated.(and still won't)

OK, I'm lost as to the 5 wire circuit in the '62 Code (per Al's post).
Are they talking about switch legs or something? I've seen buildings wired in this manner, but it didn't always reference an A, B, or C Ø. (much less a "D"Ø).
It seemed that if you put 2 wires in a conduit it was black/wh, if 3 then blk/red/wh., etc.

If I can throw another monkey-wrench into the discussion here, when did the NEC start to specify that the high-leg of a 4-wire delta must be orange? I seem to recall a discussion a few months ago in which it was said that at one time red was common the the wild phase.

<pulling out a chair, bag of chips, and a nice cold "coke-cola">
I'm going to watch this one for a while boyz. I just have one question. If you twist a black wire to a blue wire, will it work as well as if they were not twisted before you put the wire nut on?

Chugga, chugga, crunch, burp,
Doc

Er, there are ICEA/NEMA multiconductor-cable color code standards. “K1” includes white and green in combinations—“K2” omits them. Example: http://www.thewireexchange.com/colorcodesbody.html

Electure,

When I studied for my first journeyman's test, it was important to understand, along with all sorts of other stuff, two-phase five-wire circuits. I've never had the pleasure of working on such an animal, after all these years, but it was important to the folks that developed that first test, 'cause they had questions on it.

Al

electure,

the "American Electricians Handbook" depicts the 2-phase 5-wire system.

I'd totally forgotten the 5W 2Ø system.
Kind of like the Loch Ness Monster..or Bigfoot..None of us have actually seen it, but we think it exists, 'cause we read about it.
Actually, the jobs I talked about earlier were early '60's malls. No consideration was given for voltage or phase.
If 2 wires in a conduit...