Normal and Emergency Duct Bank

[electrical_questions]

Is it required by the NEC 2008 that there must be a separation of normal and emergency conduits in a duct bank?

I am installing a underground duct bank system consisting of emergency feeders and normal feeders. The will each terminate into separate precast pull boxes. However I was unclear as to whether they are able to travel in one overall concrete encased duct bank.

Thanks for the help

 

[ibew441dc]

Is it required by the NEC 2008 that there must be a separation of normal and emergency conduits in a duct bank?

I am installing a underground duct bank system consisting of emergency feeders and normal feeders. The will each terminate into separate precast pull boxes. However I was unclear as to whether they are able to travel in one overall concrete encased duct bank.

Thanks for the help

No there is no requirement to separate individual raceways into separate duct banks. See 700.9 (A) and (B) for important info regarding the wiring, as it does have to stay separate.

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