2

System Grounding Procedures

All components of a control system and the devices it is controlling must be properly grounded.

HGround conductors should be connected in a tree fashion with branches routed to a central earth ground point. This ensures that no ground conductor carries current from any other branch. This method is shown in the figure shown below.

HGround conductors should be as short and as large in size as possible. Braided straps or ground cables (typically green insulation with a yellow tracer ± AWG #12 or larger) can be used to minimize resistance. Conductors must always be large enough to carry the maximum short circuit current of the path being considered.

PROGRAMMING

DEVICE

SERIES 90±70

PLC CABINET RACK

RACK

MOTOR DRIVES

AND

OTHER

ELECTRICAL CONTROL

EQUIPMENT

a42942

MACHINERY

 

 

NOTE

 

 

SIGNAL AND POWER

EARTH

CENTRAL

CONNECTIONS

GROUND

GROUND POINT

NOT SHOWN

22

Series 90±70 Remote I/O Scanner User's Manual ± July 1992

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GE GFK0579B user manual System Grounding Procedures

GFK0579B specifications

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