OfficeServ 7200-S
INSTALLATION
TECHNICAL MANUAL
PART 1 MAY 2010
1.2
1.2 GROUNDING CONDITIONS
An equipment grounding conductor that is not smaller in size than the ungrounded branch-
circuit supply conductors is to be installed as part of the circuit that supplies the product or
system. Bare, covered, or insulated grounding conductors are acceptable. Individually
covered or insulated equipment grounding conductors shall have a continuous outer finish
that is either green or green with one or more yellow stripes. The equipment grounding
conductor is to be connected to ground at the service equipment.
The attachment-plug receptacles in the vicinity of the product or system are all to be of a
grounding type, and the equipment grounding conductors serving these receptacles are to
be connected to earth ground at the service equipment.
WARNING: HIGH LEAKAGE CURRENT!
Earth connection is essential before connecting
supply.
The OfficeServ 7200-S system requires that a supplementary earth ground be connected to
the system. This is the preferred method of grounding the OfficeServ 7200-S. It should be
noted that when the third wire ground becomes inferior it many prevent the digital data bus
from canceling out noise. This may result in erratic operation of the OfficeServ 7200-S.
Another problem that has occurred is that some UPS battery systems do not pass the ground
through to the power cord resulting in no ground to the system. The ground lug in the back
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 copper wire. Additionally, the ground between
cabinets in a multiple cabinet system must also be at least #16 AWG copper wire. The third
wire AC ground or field ground is connected to the system frame via the ground strap from
the ground connector on the AC socket.
A supplementary equipment grounding conductor shall be installed between the system and
ground that is in addition to the equipment grounding conductor in the power supply cord.
The supplementary equipment grounding conductor shall not be smaller in size than the
ungrounded branch-circuit supply conductors. The supplementary equipment grounding
conductor shall be connected to the product at the terminal provided, and shall be
connected to ground in a manner that will retain the ground connection when the product is
unplugged from the receptacle. The connection to ground of the supplementary equipment
grounding conductor shall be in compliance with the rules for terminating bonding jumpers
in Part K of Article 250 of the National Electrical Code ANSI/NFPA 70. Termination of the
supplementary equipment grounding conductor is permitted to 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.
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