HP rp7400 Manual page 13

Specify Hard Floor Requirements
A cable trough may be required when an rp7400 system is installed in a
computer room that does not have a raised floor. The power drops and
interface cables from the SPU are routed down through the cable guides
and into the cable trough.
The cable trough connects to the bottom of a power panel. It should be
sized to hold all cables and receptacles for the power drops that come
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