Chapter 4 - Electrical Connections
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MNL000298.doc
Revision 2
09/16/2016
SourceSystem TE11
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4.1
Grounding Method
The equipment must be grounded in accordance with Article 250 – Grounding in the National
Electrical Code 1993, if installed in the United States. The customer is responsible for connections to
earth ground. A ground lug is supplied on the controller as well as the plenum of the gas cabinet for
customer hookup to the facilities grounding network. Figure 4.1 shows a suggested grounding method
for a typical system. This drawing may not be applicable to your specific system.
Figure 4.1: Suggested Grounding Method
Use #4 AWG ground wire for non EMI/FRI protected systems, installed in the United States. Use
Alpha #1239, 1-3/8” flat braid or equivalent for EMI/FRI protected and CE marked systems. The total
length is not to exceed 10 feet (3 meters).
After grounding the overall resistance must be measured. This resistance for the equipment ground to
the grounding electrode cannot exceed one ohm (1Ω). Check the effectiveness of the grounding by
attaching a wire to the nearest grounding electrode and connect an ohmmeter in between the reference
ground wire and the enclosure.
For 1x1 and 1x2 cabinet configurations each cabinet requires grounding to the earth ground.