Equipment Grounding - MCi iControl User Manual

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Equipment Grounding

For good grounding, quality wiring materials and methods must be used. Grounding must con-
form to all applicable codes. Proper grounding is essential for system safety and helps to reduce
noise-induced problems.
General grounding guidelines include:
• The grounding wire to the equipment cabinet should be the same gauge (diameter) or
larger than the primary AC power feeders for the controller and should be as short as pos-
sible.
• The grounding wire between equipment cabinets may follow a branching or daisy-chain
configuration, but the wire must terminate at the last controller and NOT loop back.
• You must provide a direct, solid ground to the controller and motor. An indirect ground,
such as the building structure or a water pipe, may not provide proper grounding and
could act as an antenna — radiating RFI noise and interfering with electronic equipment
in the building.
• The conduit containing the AC power feeders must not be used for grounding.
Figure 2.5 Controller Cabinet Ground Wiring
2-14 Manual # 42-02-2222
ACCEPTABLE
NOT ACCEPTABLE
ACCEPTABLE