4000 A LV Switchgear supplied from delta wye transformer through Parallel single conductor cables per phase (non armored/non metallic) on steel tray. Due to tray size, EGC can't be accommodated in the same tray, so does the code allow the EGC to run in a separate raceway, say PVC conduit?
Notes:
Client's standard doesn't allow on using the tray as an EGC.
Personally, I feel it doesn't comply with the code per 300.4 but I am wondering if there is an exception or some other rules applicable to the case of parallel single conductors per phase?
The other independent question, let's say per table 250.122 you need 500 KCMIL EGC, does utilizing 3 parallel smaller size as EGC (say 3#2/0) satisfies the NEC?
Thanks for your feedback in advance.
Notes:
Client's standard doesn't allow on using the tray as an EGC.
Personally, I feel it doesn't comply with the code per 300.4 but I am wondering if there is an exception or some other rules applicable to the case of parallel single conductors per phase?
The other independent question, let's say per table 250.122 you need 500 KCMIL EGC, does utilizing 3 parallel smaller size as EGC (say 3#2/0) satisfies the NEC?
Thanks for your feedback in advance.