help with cord choice for redundant power supply

[melindac]

Hello,
I'm purchasing a Dell 2850 that will be rack mounted, and I have to choose between y cords and straight cords for the redundant power supply.
Can anyone tell me the difference or the pros and cons?

I'm sure this is an ignorant question, so any education you can offer me would be greatly appreciated.

Thank you,
Melinda

 

[technome]

Use a Y cord if you only have one UPS unit or the servers are getting power from outlet(s) which are on the same leg of of a 3 phase power distribution feed.

If you have two UPS units or your server room outlet are feed by 2 different legs of a 3 phase distribution, get two cords. Best to have circuit feeds to any server room on different power distribution legs, even with UPS units. If there is a power outage, utilities try to maintain at least of leg of the distribution power, if at all possible.
As in New York during the last blackout, the utility killed power, but the phase leg which is often given to commercial concerns was live most of the time, in the 24 hour period.

Best to get the separate cords.

........................................
Chernobyl disaster..a must see pictorial

http://www.kiddofspeed.com/default.htm

 

[NickFerrar]

We use 2 cords ourselves, one into mains and one into UPS supply - our electricians were a bit dubious about this but it seems to work.