Determining And Balancing Current Draw On Multiple Circuits In One Rack - HP D5970A - NetServer - LCII Manual

Chapter 2
Determining and Balancing Current Draw on Multiple
Circuits in One Rack
If you use more than one circuits or power line (each including a Power
Distribution Unit and an optional Uninterruptible Power Supply) in one rack,
attempt to balance the current drawn through each. Plan to plug in components
with smaller power requirements and connectors so that they alternate between
the circuits. In other words, plug one component into one circuit and the next
component into the other circuit.
When (in either the 208 or 230/240 VAC case) a 10-amp PDU is daisy-chained
to a 16-amp PDU, determine the load to be placed on each. Plug only those
combinations of components into the 10-amp PDU whose overall total current
draw is less than 10 amperes. Then be sure that the 16-amp PDU total load,
including the daisy-chained 10-amp PDU and any other components, does not
exceed 16 amperes.
NOTE
The PDUs will typically run out of power handling capacity
before they run out of connector receptacles in multiple LPr
rack configurations.
Connecting and Routing Cables to the HP NetServer LPr
31