Grounding
Grounding
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.
The SPD has leakage current to ground when energized and can present a hazardous touch voltage.
The device has SPD elements connected from phase to ground. To prevent hazardous touch voltage on the SPD enclosure during normal operation or during SPD
When metallic raceway is used as the wiring method, an insulated grounding conductor should be run inside the raceway and sized in accordance with all applicable codes. Maintain electrical continuity at all raceway connections using appropriate bonding devices and do not install isolating bushings to interrupt a metallic raceway run.
For best overvoltage suppression by the SPD, use a
SPDs rated for use on
12 | Installation and Operation Manual |