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HomeAircraftHelicopterMain Discussion › 24V Series on Server PSU's
08-06-2011 03:11 AM  6 years agoPost 1
fung_jeff

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Vancouver, BC, Canada

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So I'm wondering why people are powering their server power supplies with only a Y-Cable when running 24v. Why can't you just power each Power supply separately to save some risk since people say the Y-Cable makes one of the server PSU ungrounded so does my 10 minute 'paint' job work?

Thanks!

Jeffrey Fung...15 Years old - FLEET: Evo 50, Raptor 30, Trex 500, SDX's, X-Spec, Logo 10/400

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08-06-2011 03:22 AM  6 years agoPost 2
jbdww

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Round Rock, Texas

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You have to separate the ground wire on one supply because if you do not, you will be shorting one of the power supplies 12V to ground.

Skids Up
http://www.jbdww.com
http://twitter.com/jbdww/

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08-06-2011 05:06 AM  6 years agoPost 3
fung_jeff

rrKey Veteran

Vancouver, BC, Canada

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So you're saying that one outlet only has one ground... Right? So if i plug each psu to a separate outlet so they have a separate 120v ground? Right?

Thanks

Not really sure..

Jeffrey Fung...15 Years old - FLEET: Evo 50, Raptor 30, Trex 500, SDX's, X-Spec, Logo 10/400

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08-06-2011 05:12 AM  6 years agoPost 4
nbit

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Houston, TX - USA

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Doing that increases the size of the short. Now the wiring in the wall becomes part of the short because the grounds connect in the wall outlet and house wiring, etc...

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08-06-2011 06:11 AM  6 years agoPost 5
fung_jeff

rrKey Veteran

Vancouver, BC, Canada

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Anyone want to expand or draw something out? It'd be apprefiated!

Thanks!

Jeffrey Fung...15 Years old - FLEET: Evo 50, Raptor 30, Trex 500, SDX's, X-Spec, Logo 10/400

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08-06-2011 12:13 PM  6 years agoPost 6
BarracudaHockey

rrMaster

Jacksonville FL

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Ground is ground

Andy
AMA 77227
http://www.jaxrc.com

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08-06-2011 01:11 PM  6 years agoPost 7
B.T.D.T.

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NY

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08-06-2011 03:42 PM  6 years agoPost 8
jbdww

rrElite Veteran

Round Rock, Texas

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You have to isolate ground from the two power supplies. There is no danger in doing this. At most there is only a 12V DC difference, which you will not feel a thing unless you stick your tong to it.

The - terminal is connected to the chase, which is connected to the ground wire which goes all the way out to the electric pole. When you connect the + terminal on one supply to the - terminal on the other supply and you do not isolate the ground, you will be shorting out the + side to the - side on one of the power supplies.

If you do not understand this, then go spend the $$ and get a single 24V power supply.

Skids Up
http://www.jbdww.com
http://twitter.com/jbdww/

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