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10
IO-70067
01/2020
ASCO 360 Surge Protective Device (SPD)
System Grounding
NOTICE
LOSS OF SURGE SUPPRESSION
• Verify that the service entrance equipment is bonded to ground in
accordance with all applicable codes.
Failure to follow these instructions can result in equipment damage.
The ASCO 360 has SPD elements connected from phase to ground. It is
critical that there be a robust and effective connection to the building
grounding structure. The grounding connection must utilize an equipment
grounding conductor run with the phase and neutral connection of the power
system. Do not connect the SPD to a separate isolated ground.
For proper voltage suppression by the ASCO 360 SPD, 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 NEC Art 250). The
ground impedance measurement of the electrical system must be as low as
possible and in compliance with all applicable codes for sensitive electronic
and computer systems.
System Grounding
Wiring and Installation
NOTICE
LOSS OF SURGE SUPPRESSION
• 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 surge protective device.
• 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 equipment damage.
HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH
• Apply appropriate personal protective equipment (PPE) and follow safe
electrical work practices. See NFPA 70E, NOM-029-STPS or CSA Z462.
•
This equipment must only be installed and serviced by qualified electri
-
cal personnel.
•
Turn off all power supplying this equipment before working on or inside
equipment.
•
Always use a properly rated voltage sensing device to confirm power is
off.
• Replace all devices, doors and covers before turning on power to this
equipment.
•
This equipment must be effectively grounded per all applicable codes.
Use an equipment-grounding conductor to connect this equipment to the
power system ground.
•
Confirm the surge protective device voltage rating on the module or
nameplate label is not less than the operating voltage.
Failure to follow these instructions will result in death or serious injury.
DANGER
