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26 C120-H007-05EN
CHAPTER 3 Equipment Layout
3.3 Precautions in Preparation of an Equipment
Layout
In preparing an equipment layout, take into account hardware constraints, operational
considerations, and installation equipment constraints.
3.3.1 Hardware constraints
(1) Cable length limitations
Each signal cable or power control cable has a limitation on its length. In laying out
equipment, be careful not to exceed these limitations.
(2) Wiring volumes and routes
a) Small systems
In small systems involving a relatively low volume of wiring, equipment may be
installed in an I, L or E-shaped layout to simplify the wiring routes on or under the
floor.
Cover any wires or connections that are laid on the floor so that they do not interfere
with traffic.
b) Larger systems
In larger systems with an increased volume of wiring, a free-access floor is required.
This is a raised floor structure in which the floor plates are removable.
(3) Heat dissipation from equipment
If devices that dissipate a high amount of heat are used, they must not be concentrated
within the same area considering air conditioning capability (1 or 2 kW/m
2
).
3.3.2 Operational considerations
(1) Equipment functionality and operability
The components that make up a server system each have a specific functional goal to
serve and should be grouped for ease of system operation.