S
YSTEM GROUNDING
C
AUTION
S
YSTEM GROUNDING
· SPD must be installed on solidly grounded power systems.
· Verify that the service entrance equipment is bonded to ground in
accordance with all applicable codes.
· Verify that the neutral terminals are grounded to system ground in
accordance with all applicable codes.
Failure to follow these instructions can result in equipment
damage.
An equipment ground conductor must be used on all electrical circuits
connected to the SPD. For the best performance, use a single-point
ground system where the service entrance grounding electrode system
is connected to and bonded to all other available electrodes, building
steel, metal water pipes, driven rods, etc. (for reference, see IEEE STD
142-1991). The ground impedance measurement of the electrical system
should be as low as possible, and in compliance with all applicable
codes, for electronics and computer systems.
When metallic raceway is used as an additional grounding conductor,
an insulated grounding conductor should be run inside the raceway and
sized in accordance with all applicable codes.
W
ARNING
I
NADEQUATE RACEWAY ELECTRICAL CONTINUITY
· Ground impedance must be as low as possible and in compliance with
all applicable codes for electronic and computer systems.
· Install an insulated grounding conductor inside a metallic raceway when
the raceway is used as an additional grounding conductor. Size the
conductor in accordance with all applicable codes.
· Maintain adequate electrical continuity at all raceway connections.
· Do not use isolating bushings to interrupt a metallic raceway run.
· Do not use a separate isolated ground for the SPD.
· Verify proper equipment connections to the grounding system.
· Verify ground grid continuity by inspections and testing as part of a
comprehensive electrical maintenance program.
Failure to follow these instructions can result in death or
serious injury.
ELECTRICAL
APC MODULAR PANEL PRODUCTS Surge Protective Device (SPD)
(4 pages)
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