Ground fault return conductor

Electrical Power Supply and Distribution
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93

5-811-1/AFJMAN

32-1080

f. Ground fault return conductor. Medium volt-

grounding system will be coordinated with the

single-point grounding system of other low-frequency

age cable systems will incorporate a grounding

networks. Inter-connection of such grounding sys-

conductor connected in parallel with the cable

tems will be made at a single point. Separate or

shields and bonded at each point where they are

isolated earth connections called "quiet grounds"

connected to ground. The conductor will be sized

(or any other such "name") will not be provided.

for the available system ground-fault, but will not

Installations located less than 25 feet apart, with

be less than a # 2/0 AWG copper conductor.

interfacing data cables, will have interconnected

Metallic conduit is not an acceptable substitute for

earth electrode systems. Installations located

the conductor. The ground fault return conductor

greater than 25 feet apart, with interfacing data

will not be required when concentric neutral cable

cables, will be considered as stand alone installa-

is specified.

tions, with individual earth electrode systems.

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