Samsung OfficeServ500, Installation Manual

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3-1
Chapter 3 Grounding, Power Connections
and Cabling
Grounding
An equipment grounding conductor that complies with the electrical specifications of your country is to
be installed as part of the circuit that supplies the system. Bare, covered, or insulated grounding con-
ductors are acceptable. Individually covered or insulated equipment grounding conductors should
have a continuous outer finish that is either green or green with one or more yellow stripes.
The AC power outlets to which the system is to be connected should all to be of a grounding type. The
equipment grounding conductors serving these outlets should be connected to earth ground at the
service equipment.
WARNING: HIGH LEAKAGE CURRENT! Earth connection is essential before connecting
supply.
The system requires that a supplementary earth ground be connected. This is the preferred method of
grounding. The third-wire ground may be inferior or can contain noise that may prevent the digital data
bus from cancelling out noise, and may result in erratic operation. Also, some UPS battery systems do
not pass the ground through to the power cord, resulting in no ground to the system. The grounding
bar on the bottom of the left side of the cabinet must be connected to one of the following: bonded
building steel, cold water pipe or a ground rod using at least #16 AWG (1.3mm) copper wire. Addition-
ally, the ground between cabinets in a multiple cabinet system must also be at least #16 AWG
(1.3mm) copper wire. The third wire AC ground (or FG) is connected to the system frame via the
ground strap from the ground connector on the AC socket (
Figure 3-1 ).
A supplementary equipment grounding conductor must be installed between the system and ground in
addition to the equipment grounding conductor in the power supply cord. The supplementary equip-
ment grounding conductor must not be smaller than the ungrounded branch-circuit supply conductors.
The supplementary equipment grounding conductor must be connected to the system at the terminal
provided, and must be connected to ground in a manner that will retain the ground connection when
the system is unplugged from the AC outlet
. Termination of the supplementary equipment grounding
conductor may be made to building steel, to a metal electrical raceway system, or to any grounded
item that is permanently and reliably connected to the electrical service equipment ground.
Failure to provide an adequate ground may cause a safety hazard, faults or even circuit card
failure.
WARNING: Unplug the power cord from the AC outlet before attempting to connect the
ground. Hazardous voltage may cause death or injury. Observe extreme caution when
working with AC power. Remove champ connectors from trunk cards.