Example of PDU Usage Calculation
Rack Configuration Planning 5-5
In the calculations in Tab l e 5-4, components were added one by one, calculating:
The total current demanded by the components
The total space used in the rack
The total number of outlets required
In this example, two PDUs can provide enough current for two ftServer 2600, 4500, or
6300 systems, the LCD monitor unit, one tape drive (typical), and one
ftScalable Storage system. This set of components consumes 11.62 amperes; adding
another ftServer system would increase the consumption to 15.83 amperes, which
exceeds the 15 amperes limit for the PDUs. The configuration also utilizes 5 outlets in
the A-side PDU and 15U of rack space.
To add any more components, you require another pair of PDUs.
For information about planning a rack configuration, see:
“Using PDUs” on page 5-1
“Determining PDU Requirements” on page 5-2
“Example of PDU Usage Calculation” on page 5-4
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