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Old 07-04-2002, 01:43 PM   #1
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Registered: Jun 2002
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Lightbulb Interconnect power supplies?

I have two computers but both have only 3 power supply options for hdd's and cdrom's. I happen to have 2 HDD ,a CD-Rom and a CD-RW. Is it unwise to run the two computers side-by-side and have one of the power connectors running from one computer to the other?

Are there any viable reasons anyone can suggest as to why this might be a bad idea?

Thanks for any input.
Old 07-04-2002, 02:02 PM   #2
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what's wrong with buying just a couple of power splitters or something, only what.. $4 each? my box is full of them
Old 07-06-2002, 11:50 PM   #3
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The two primary concerns when powering multiple devices off of a single power supply is phase lag between devices and that the potential of each ground is exactly the same. A difference in ground can occur because some supplies use a center-tap transformer and you have to _assume_ that the windings are both exactly the same. This is usually true, but not always. If two separate supplies are used in the two cases but some drive connectors are rerouted from one case to the other, a difference in ground will result in a current flowing through one drive to the case or possibly through a HD data ribbon. Sure, this is unlikely but I saw somebody blow a $4000 HV supply because of exactly this scenario... it does happen. The thing to do is to run a wire (16 Ga or so) between both cases to be _sure_ that both cases level off at the same ground potential.


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