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Please help: Motor Constructionction NEMA Vs IEC

Please help: Motor Constructionction NEMA Vs IEC

Please help: Motor Constructionction NEMA Vs IEC

(OP)
Dear Sir,

In IEC, there's a Ex 'n' and Ex 'e' construction.  However, in NEMA, what's the equivalent?

If we need to use a motor in class 1 division 2 area with possibility of hydrogen (Group B).  How can we specify for a NEMA frame-size motor?

Thanks.

Regards
etgbccc

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