Fujitsu C120-H007-06EN (2) Grounding in the buildings conforming with the IEC standards.

78 C120-H007-05EN
CHAPTER 6 Power Supply Facilities
(2) Grounding in the buildings conforming with the IEC standards.
In the installation of server systems to the buildings based on the equal potential
bonding principal of the IEC standards, the server systems must be grounded using
grounding facility shared with other facilities.
Because the ground is not the dedicated one, the grounding trunk cables for the server
systems are preferably branched from the grounding box near the grounding electrode
(the main grounding terminal).
If there is no way other than branching from the omnibus grounding cable nearest to
the server systems, please consult with Fujitsu Facility section because noise
countermeasure which requires expertise is required in most cases.
Primarily, the wiring of grounding trunk cable must be implemented by the metal
conduit installation method using special insulated cables. Follow Table 6.5 for the
cable size.
Table 6.5 Specification of the grounding trunk cable for server systems
(in the buildings complying to the IEC standards)
Cross section of the phase
conductor of the facilities
S (mm2)
Minimum cross section of the
grounding trunk cable
Sp (mm 2)
Note: The term "the phase conductor of the facilities"
represents a conductor of a phase of a power supply
cable which is led into the distribution panel.
S 16 (AWG5)
16 (AWG5) < S 35 (AWG2)
S > 35 (AWG2)
S
16 (AWG5)
S/2