Datasheet

Installation and Operation Manual 11
Grounding
The SPD has leakage current to ground when energized and can present a
hazardous touch voltage.
Figure 2: Surge Protective Device Wiring Practice
To load(s)
Phases
Neutral
Ground
Ground bus
Neutral bus
SPD
Phase A
Phase B
Phase C
Neutral
Ground
Panel
Interconnect wiring
– Minimize length
– Avoid sharp bends
WARNING
HAZARDOUS TOUCH VOLTAGE
• Connect the SPD ground terminal to the building grounding grid
structure.
• Use an appropriately sized equipment grounding conductor.
• When using metallic raceway or conduit:
— Do not use the SPD ground unless augmented with an insulated
equipment grounding conductor installed inside the metallic raceway or
conduit.
— Do not use isolated bushings to interrupt the metallic raceway or
conduit.
— Maintain electrical continuity at all raceway and conduit connections
using appropriate bonding devices.
• Do not use a separate isolated ground for the SPD.
• Verify proper equipment connection to the grounding system.
• Verify ground grid continuity by performing regularly scheduled
inspections and testing as part of a comprehensive electrical
maintenance program.
Failure to follow these instructions can result in death or serious injury.
Grounding