1 . Preferred method of grounding
Dura Mag meters come standard with a set of grounding rings for use with the preferred method of grounding Dura Mag
meters.
This method can be used for all installations, but it is required for non-conductive or internally coated pipe. When pipes are
non-conductive, such as PVC or internally coated pipe, you must substitute direct grounding with grounding rings. (Figure
15)
Attach the provided 12 gauge wire or equivalent to the sensor ground lug. Then connect this sensor ground lug to an earth
ground point; refer to NEC or local grounding regulations for wiring requirements in making this connection.
Next, connect the two mating grounding rings with a 12 gauge wire or equivalent, attached to the grounding ring lugs, and
connect them both to the earth ground. The Dura Mag should be electrically isolated from the pipeline.
Grounding ring lug
and 12 gauge ground wire
Optional earth
ground for
installations with
building ground
noise
Sensor
ground lug
Grounding ring lug
and 12 gauge ground wire
Sensor
ground lug
12 gauge
ground wire to
earth ground
Figure 15 . Preferred method of grounding
7 .1
Sensor Grounding Methods
All Dura Mag flow meter installations require minimum grounding with a 12-gauge ground wire to an earth ground.
Installation must conform to NEC requirements. Flanges on the Dura Mag sensor have a non-conductive coating and may
not require grounding rings. For best performance, McCrometer can provide optional grounding rings for all sizes.
When installing into a PVC or plastic pipe system, grounding rings are recommended for all sizes.
Three methods of grounding are described in this section:
•
Grounding for non-conductive or internally coated pipe (preferred method of grounding)
•
Grounding for meters in an electrically noisy environment
•
Grounding for meters with minimal ground noise
30122-53 Rev. 2.0 | 25APR2022
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Grounding and Electrical Interference
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URA
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