AT Power Supply Question

[ComputerWizKid]

How do I wire the power switch? I have 5 wires comeing out of it one of which is ground Blue Black White Brown Green with yellow stripe Thanks

 

[Buck Naked]

😕
Are you wiring your case power switch to your mobo header?
If so either, RTFM, or at least post what the equip is. That way if somebody has the same gear they can tell you.

 

[ComputerWizKid]

No it's an AT Power supply no motherboard involved I using it to test fans and lights and other 12V and 5V items

 

[JimPhelpsMI]

Hi, Jumper the green lead to any black lead in the 20/24 pin connector from the PS. You can also use a switch. Jim


EDIT: OOPS! Read that as ATX. AT uses a Double Pole Single Throw switch of any type that has the push on connectors or solder if you prefer. Safest way has already been given here to ask some one who has one. If you can use an Ohm Meter, ring out the leads. The two from the AC connector go to one side of each switch section and the other two to the other side. Safer for you if you use the DPST switch as it breaks both sides of the line. You could use a Single Pole switch and just connect the two unused wires. Get it backward and the House Circuit breaker will blow so, check it out well. The green lead is not necessary, but could be connected to the device you are testing if it's in a metal box or etc.
Hope this will be a little help, Jim

 

[Jiggz]

AT PSU's are hardwired which can only be turned on by connecting the two wires using a maintaining switch. There are various designs but the most common ones uses two pole switch. Your best bet is to open and trace the wires.

 

[Susquehannock]

Originally posted by: JimPhelpsMI
Hi, Jumper the green lead to any black lead in the 20/24 pin connector from the PS. You can also use a switch. Jim

That is an ATX power supply. 😛

Jiggz is right, AT power supplies had a 120v AC switch on the front panel. One thing that was
done away with in ATX.

 

[Zepper]

The PSU itself should have a switch wiring diagram on the label somewhere (but it may NOT be accurate - it has happened to me, so always trace the wiring to be sure!) : Most often I've found it to be:
- Black is HOT coming in from wall,
- White is neutral coming from wall,
- Blue is neutral going back to PS from switch,
- Brown is HOT going back to PS from switch.

The usual switch was a DPST 10 Amp push on-push off or rocker - the neutral wires conect to one pole (side) and the hot connect to the other pole - white and black across from each other and blue and brown acoss from each other - IOW, white and black would go on the common (usually near the physical center position of the switch). Green is ground and usually has a ring or spade terminal on the end to go under a screw on the chassis somewhere near the swich (really can go wherever it reaches) .

coarse diagram of typical switch terminals

push-|-button switch shank.
------_|_
-----|----| (one end may have no terminals or not used if present)
----- ---- --
Bk--|----|-W
----- ---- ---
Bn--|----|-Blu

Hope that looks correct on your screen.

.bh.

 

[Jiggz]

Originally posted by: Zepper
The PSU itself should have a switch wiring diagram on the label somewhere (but it may NOT be accurate - it has happened to me, so always trace the wiring to be sure!) : Most often I've found it to be:
- Black is HOT coming in from wall,
- White is neutral coming from wall,
- Blue is neutral going back to PS from switch,
- Brown is HOT going back to PS from switch.

The usual switch was a DPST 10 Amp push on-push off or rocker - the neutral wires conect to one pole (side) and the hot connect to the other pole - white and black across from each other and black and brown acoss from each other - IOW, white and black would go on the common (usually near the physical center position of the switch). Green is ground and usually has a ring or spade terminal on the end to go under a screw on the chassis somewhere near the swich (really can go wherever it reaches) .





coarse diagram of typical switch terminals

push-|-button switch shank.
------_|_
-----|----| (one end may have no terminals or not used if present)
----- ---- --
Bk--|----|-W
----- ---- ---
Bn--|----|-Blu

Hope that looks correct on your screen.

.bh.

Let me try another diagram to see if it will make it easier:

Blk-------| |--------Bn
___________________

Wh-------| |--------Blu

Grn/Yel ------>>>gnd

 

[Zepper]

Perhaps easier like t his
----------------------Switch------------------

Wall Hot--->------Bk___/ ___Brn-------> PSU hot

Wall Neut->-----Wh___/ ___Blu---------> PSU neut.

 

[ComputerWizKid]

Thanks got it right the first time