[BBLISA] PDU Power Ratings?

[John Orthoefer]

First off most equipment these days is auto-sensing it doesn’t care between about 100v and 240v.  

IF you have something that is 120v and pipe 208v into the BEST thing that can happen is you pop the breaker in your gear. Worst is something burns out, arcs and you start a fire.  In general you should NOT be able to do it without some custom engineering, Because the plugs change between between 120 and 208.  

The blades change orientation between 20amps and 30amps.  Ever see a 120 plug where the blades are like - | instead of | | ?  that is because the - | is for 20amps @120v.  | | is for 15amps @120v.  

As another said I would look to get 208/210 in and move everything that I can to that.  

Watts = Volts x Amps
so if you 500 watt power supply = 208 x 2.4 = 120 x 4.2.

Which means you can run roughly 2x as much gear off 208volts @ 0amps than you can 120volts @20amps.

johno 

On Apr 2, 2014, at 12:30 PM, Scott Danek <scott_danek at terc.edu> wrote:

> Hi all,
> 
> We're looking into increasing our power in our colocation from 120V 20 amp to 120V 30 amp so that we can add more equipment. When looking for PDU's it seems that a PDU that will take a 120V input and output 30 amps is uncommon. Most 30 amp PDU's we've seen seem to take a 200V+ input. If we got a PDU that lists a 200V or 208V input and output, and plugged it into a 120V circuit, what would be the outcome? Would that be ill-advised? Thanks!
> 
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