Grounding Bushing

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jusme123

Senior Member
Location
NY
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JW
If you have a panel and have 8- 4" conduits all with 500 MCM, and want to run one wire thru all the grounding bushings and then continue to the grounding bar from the last grounding bushing, what ground size wire would be required. The breakers are 400, 600, and 1200 amps. List code sec please. Would table 250.122 still apply and use a 3/0 thru ALL the bushings?
 
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Unlike dealing with service conductors, with feeders you can size the jumper for the largest OCP device and Table 250.122
250.102(D) is your reference.
 
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