ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
ShoutChat Box
Recent Posts
HVDC Greece to Crete
by gfretwell - 08/06/20 02:28 AM
310.15 (B) 7 Feeders
by HotLine1 - 07/31/20 02:29 PM
What would be the ideal solution?
by Fleppin - 07/21/20 12:42 AM
NESC question
by gfretwell - 07/16/20 04:17 PM
Code Violation or just not good Practice?
by HotLine1 - 07/16/20 03:03 PM
New in the Gallery:
Facebook follies, bad wiring
FPE in Germany pt.2
Who's Online Now
0 registered members (), 13 guests, and 25 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
PSU Output leads? #132189 05/31/05 03:21 AM
Joined: Jul 2002
Posts: 8,329
Trumpy Offline OP
Member
Just a quick question.
Which of the output leads from a PSU are the 12V and 5V leads?.
As in the red wires and the yellow wires.
I used to know this off-by-heart, but I'll be blowed if I can remember now.
I'm assuming that the Red wires are the 12VDC wires and the Yellow wires are the 5VDC wires.
Can anyone confirm this, or on the other hand, tell me otherwise?.

Cheers,
Mike.
[Linked Image]

[This message has been edited by Trumpy (edited 05-31-2005).]

Tools for Electricians:
Re: PSU Output leads? #132190 05/31/05 06:34 AM
Joined: Jul 2004
Posts: 145
C
chipmunk Offline
Member
The yellow is +12v, the red is +5v.
Other wires potentially of interest:
Brown: +3.3v
Blue: -12v
White: -5v
Green:PS_ON, [Short to ground to turn the PSU ON]
Black: Ground
Purple: +5v Standby [permanently on while AC Supply is live]
Grey: Power good signal from PSU

These apply only to ATX power supplies, and some manufacturer specific ones, [eg dell etc.] may be different, even in a dangerous way. However, the +5v=red and +12v=yellow seem to be universal.
(Edit: I found a good page of information here .
The info may be slightly out of date as some of the modern PSUs don't supply the negative voltages which were only used for serial ports, and there may be extra connectors for more modern higher power motherboards)

[This message has been edited by chipmunk (edited 05-31-2005).]

Re: PSU Output leads? #132191 05/31/05 08:49 AM
Joined: Jul 2002
Posts: 8,329
Trumpy Offline OP
Member
Cool,
Thanks Chipmunk,
Just wanted to make sure. [Linked Image]

Re: PSU Output leads? #132192 05/31/05 11:52 AM
Joined: Jul 2004
Posts: 9,513
G
gfretwell Offline
Member
PC supplies are pretty good for other uses but be aware some older designs will not start without a load.


Greg Fretwell

Featured:

2020 National Electrical Code
2020 National Electrical
Code (NEC)

* * * * * * *

2017 Master Electrician Exam Preparation Combos
2017 NEC Electrician
Exam Prep Combos:
Master / Journeyman

 

Member Spotlight
pcsailor
pcsailor
Minneapolis, MN, USA
Posts: 21
Joined: September 2019
Show All Member Profiles 
Top Posters(30 Days)
BigB 3
Popular Topics(Views)
268,614 Are you busy
202,965 Re: Forum
191,341 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.7.3