Bus Conversions dot Com Bulletin Board
July 30, 2014, 02:18:33 AM *
Welcome, Guest. Please login or register.

Login with username, password and session length
News: 500 Members as of May 5th, 2006.  Smiley  3,499 Members as of October 21, 2012 Cheesy

   Home   Help Forum Rules Search Calendar Login Register BCM Home Page Contact BCM  
Pages: [1]   Go Down
  Print  
Author Topic: 12Vdc wire colors  (Read 4001 times)
pabusnut
Sr. Member
****
Offline Offline

Posts: 291


P8M4905A-333 former MK&O lines #731




Ignore
« on: November 05, 2010, 06:15:11 PM »

I am nearing the time when I will be pulling wire for my electrical system and need help with wire colors.

I will be using all stranded wire, run through conduits for both the 110VAC and the 12VDC. 

For the 12VDC, the question is do I use Black for negative and RED for positive like in automotive applications?
OR do I use yellow for negative and red for positive like I have seen in Marine applications?

Using yellow for the 12VDC seems to make sense to me and would certainly help avoid any potential confusion if somehow somebody got confused in the future(which would probably be me 10 yrs from now!)

As always, All help is truly appreciated!


Steve Toomey

PAbusnut
Logged

Steve Toomey
PAbusnut
TomC
Hero Member
*****
Offline Offline

Posts: 6682





Ignore
« Reply #1 on: November 05, 2010, 07:44:32 PM »

You can use any color you want for any wire you want-just as long as you spell out what the wire and color is for at the electrical box.  I personally still like black for DC ground and multi colored wires for the individual circuits.  Good Luck, TomC
Logged

Tom & Donna Christman. '77 AMGeneral 10240B; 8V-71TATAIC V730.
Boomer
Hero Member
*****
Offline Offline

Posts: 617




Ignore
« Reply #2 on: November 05, 2010, 09:26:02 PM »

FYI only, Prevost Car uses yellow for 12V circuits and red for 24V circu
Logged

'81 Eagle 15/45
'47 GM PD3751-438
'65 Crown Atomic
Vancouver, WA USA
Boomer
Hero Member
*****
Offline Offline

Posts: 617




Ignore
« Reply #3 on: November 05, 2010, 09:30:00 PM »

Computer malfunction.  Prevost, on newer coaches anyway, uses yellow for 12V and red for 24V hot wires.  Really nice when you open up the electrical panel.
Logged

'81 Eagle 15/45
'47 GM PD3751-438
'65 Crown Atomic
Vancouver, WA USA
belfert
Hero Member
*****
Offline Offline

Posts: 5396




Ignore
« Reply #4 on: November 05, 2010, 10:19:51 PM »

I chose to use red for positive and black for ground for my DC stuff.  I use the same color for both 24 and 12 volt.  It tends to confuse things a bit when I connect to something that uses black for positive and white for ground.

Dina used every color under the rainbow for wire colors.  Luckily, most wires either have a wire number printed on the jacket or on a heat shrink label.
Logged

Brian Elfert - 1995 Dina Viaggio 1000 Series 60/B500 - 75% done but usable - Minneapolis, MN
Cary and Don
Hero Member
*****
Offline Offline

Posts: 662




Ignore
« Reply #5 on: November 07, 2010, 03:32:37 PM »

Our 4107 has color code for the wires as to their function.  For instance, all the blue wires might go to the windshield wipers, all the yellow wires might go to the headlights, markers, and turn signals.  The engine control wires will all be the same color.  Of course, they have a huge assortment of patterns in each color.  We are going to try and use a similar system on wiring the Neoplan.  At least you have a clue what a wire does when you see it somewhere.

Don and Cary
GMC4107
Neoplan AN340
Logged

1973 05 Eagle
Neoplan AN340
Slow Rider
Global Moderator
Hero Member
*****
Offline Offline

Posts: 669




« Reply #6 on: November 14, 2010, 05:32:10 PM »

Where are you going to source the wire for the Neoplan?

Frank
Logged

The MCI has landed..... We are home.
Dale City Va.  Just a southern suburb of DC
Yes I am a BUSNUT
1976 MCI MC8
Joe Camper
Hero Member
*****
Offline Offline

Posts: 666



WWW

Ignore
« Reply #7 on: November 14, 2010, 05:45:31 PM »

I would decide the color based on the colors the chassis d/c stuff is on my bus and go with DIFFERENT colors from that.
Logged

Signing off from Cook County Ill. where the dead vote, frequently.
JackConrad
Orange Blossom Special II
Global Moderator
Hero Member
*****
Offline Offline

Posts: 4446


73' MC-8 8V71/HT740 Southwest Florida


WWW
« Reply #8 on: November 15, 2010, 05:06:19 AM »

    I went a different route. I used grey for DC ground since there are no grey wires on our coach (OEM or added by us) except 12 volt ground. This insures nothing else gets connected to ground and ground never gets connected to a hot terminal. 12 volt hot are somewhate color coded (lighting circuits are yellow, water circuits are blue, engine control circuits are green, brake circuits are red, etcf) In addition all wires are labeled and most importantly, wireing drawings and list were made at the time we wired the bus. This is very important, because you WILL forget.  Jack
Logged

Growing Older Is Mandatory, Growing Up Is Optional
Arcadia, Florida, When we are home
http://s682.photobucket.com/albums/vv186/OBS-JC/
pabusnut
Sr. Member
****
Offline Offline

Posts: 291


P8M4905A-333 former MK&O lines #731




Ignore
« Reply #9 on: November 15, 2010, 05:17:00 AM »

Thanks for all the input!

I have decided that I won't use black for ground on the 12VDC system, and may go with gray as Jack did.  Since everything will be in conduit(blue smurf), I will be labeling both the wires and the outside of the tube.  My system will not be complex, as I am leaning heavily towards simplicity and functionality.  I have some friends who have access to those nice computer programs that generate legible wiring diagrams, so I probably will call in a few favors to have my "as built" sketches turned into legible drawings.

Steve Toomey
Logged

Steve Toomey
PAbusnut
Bill B /bus
Sr. Member
****
Offline Offline

Posts: 267





Ignore
« Reply #10 on: November 15, 2010, 06:43:49 AM »

I used a color system as follows: Brown is 12V or 24V ground, red is 12V positive, Yellow is 12V positive for the heating system. Fairly simple.  Jack is 100% right is writing down everything and labeling the wires. That sold the first coach when I showed the buyer the book of wiring diagrams and lists of wire locations, where run, and terminal board location.  It was work but I didn't have to remember what I had done 5 years ago.

Bill
Logged

Bill & Lynn
MCI102A3, Series 50 w/HT70
Ed Hackenbruch
Hero Member
*****
Offline Offline

Posts: 2361




Ignore
« Reply #11 on: November 15, 2010, 07:03:53 AM »

You guys take all of the fun and challenge out of it. Make them all red! Smiley  Years ago the company i was working for was doing the ground work for a high dollar subdivision for a resort area on Maui. One of the things that we had to do was run a sewer line across two fairways on the golf course. When they came across the conduit for the wires for the sprinkler system for the course, the course bigwigs said to just cut thru it. Turns out that all of the wires were red.....and there were something like 50-60 of them. Shocked  They had a guy sitting there on a 5 gallon bucket with a radio  and several other guys with radios out in different areas of the course for a week while he was hooking wires together and finding out what sprinklers on what part of the course came on when they turned on power to them. They had to get it to where all of the sprinklers in a certain section of the course came on at the same time, as some areas got more water than others and it was all on timers. They told me later it was one of the worst decisions that they had ever made there. Smiley  If they had cut the conduit and put two tags on each wire and then cut the wire between the tags, one guy could have put all of the wires back together in an hour or two. Grin
Logged

1968 MCI 5A with 8V71 and Allison MT644 transmission.  Western USA
eddiepotts
Sr. Member
****
Offline Offline

Posts: 446





Ignore
« Reply #12 on: November 15, 2010, 07:09:53 AM »

On my prevost I have a large chart on the panel door that has what the wire is, the number on the wire, the number to the connection on the panel, then the number wire where it goes. It makes it real simple to trace things down.
Logged
Pages: [1]   Go Up
  Print  
 
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.18 | SMF © 2013, Simple Machines Valid XHTML 1.0! Valid CSS!