4000a Feeder from switchgear

Capital · Jan 23, 2020

4000a 120/208 — 4”PVC (11) 750kcm alum.
Trying to understand how to size the equipment ground — the code seems ambitious—

masterinbama · Jan 23, 2020

Is this a feeder or a service ?

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masterinbama · Jan 23, 2020

500 mcm in all 11 conduits for a feeder. And single 3/0 for a 4000 amp service.

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Capital · Jan 23, 2020

Capital said:
4000a 120/208 — 4”PVC (11) 750kcm alum.
Trying to understand how to size the equipment ground — the code seems ambitious—

Feeder

masterinbama · Jan 23, 2020

masterinbama said:
500 mcm in all 11 conduits for a feeder. And single 3/0 for a 4000 amp service.

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500mcm copper or 800 mcm Aluminium

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Capital · Jan 23, 2020

Feeder

Capital · Jan 23, 2020

That’s what I thought, but could not find it clear in the codebook

masterinbama · Jan 23, 2020

Capital said:
Feeder

500mcm copper or 800 mcm Aluminium in all 11 conduits.

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don_resqcapt19 · Jan 23, 2020

Capital said:
That’s what I thought, but could not find it clear in the codebook

250.122(F)

infinity · Jan 23, 2020

masterinbama said:
500mcm copper or 800 mcm Aluminium

My 2017 NEC says 750 kcmil aluminum.

augie47 · Jan 23, 2020

'14 is 750AL also