CT cabinet need to be grounded ?

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I couldn't get a straight answer from the REMC office or from the elec inspector. While the REMC guys were connecting today, I asked them. They said usually there is a ground bar mounted to the cabinet and we run a #6 from it to the neutral line lug. So I installed a ground bar for them and they bonded it with a #6 Cu. I don't know, I got opposing answers on this posting. I still don't know if I did it correctly. Thank you

Better than nothing I guess but that #6 should be a 1/0 or 2/0 depending on your phase conductor(s) {250.102(C)}
 
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