NM cable in environmental air space

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Old 08-23-14, 07:19 AM
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NM cable in environmental air space

I know that NM cable is not rated for environmental air spaces. I watched a video on You Tube where the guy ran EMT inside a return air plenum with NM cable in the EMT. Compliant? He made several mistakes [ungrounded metal boxes, overfilled a 1900 box], but I was unsure about using NM in conduit in an environmental air space. If you know for sure, kindly quote chapter and verse. Thanks.
 
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Old 08-23-14, 08:49 AM
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Section 300.22............................................
 
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Old 08-23-14, 02:13 PM
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300.22

Thanks. It looks like 300.22[C][1] covers it.
 
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