DS 616
INSTALLATION
TECHNICAL MANUAL
PART 2 JUNE 2002
2.3
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 DS 616 system requires that a supplementary (see below) earth ground be
connected to the system. This is the preferred method of grounding the DS 616. It has
been observed that the third wire ground may be inferior or can contain noise that may
prevent the digital data bus from canceling out noise. This may result in erratic
operation of the DS 616. 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 grounding lug 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 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 FG 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.
Bare, covered, or insulated grounding conductors are acceptable. A covered or
insulated grounding conductor shall have a continuous outer finish that is either green
or green with one or more yellow stripes.
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