Power Rating; Placement Of Redundant Pdu Components - HP E Series User Manual

Power rating

As was the case with leakage current, if equipment is added to the EML rack from other sources, it is your
responsibility to ensure the power rating of the PDU and power cords are not exceeded by the load of
this additional equipment. The power rating of the PDU is sufficient to power up to seven power supplies
in the EML that are allowed by the leakage current specification. You must check the power ratings of any
additional equipment added to the rack, the power rating of the PDU, and the power rating of the power
cords, to ensure all are within specified limits.

Placement of redundant PDU components

The EML primary PDU (#1) and two power strips (#1 and #3) are installed at the factory. The redundant
PDU (#2) is installed above the primary PDU, also in a 0U side mount orientation. The top of PDU #1 is
approximately 13 inches from the caster boss. The top of PDU #2 is placed approximately 25 inches
from the caster boss (see
Power strip #2 is placed equidistant between power strips #1 and #3.
Power strip #4 is placed in a position low in the rack so that it does not interfere with the power cords
coming from PDU #1 to power strips #1 and #3.
With properly placed power strips in a fully redundant 40U configuration, the top six power supply cords
go to power strips #1 and #2. One power cord at each redundant level goes to each power strip.
Similarly, the bottom four power cord in a fully redundant configuration are divided between power strips
#3 and #4. By using half meter power cords, the dressing should be minimal.
126 Installing a redundant PDU
Figure 57).