Nec 2017 section 450.21(B)

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hhsting

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Glen bunie, md, us
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Junior plan reviewer
I have next to outside building wall 150kVA dry type transformer.

I am wondering if the 150kva transformer is outside would NEC 2017 section 450.21(B) apply or the transformer has to comply per NEC 2017 section 450.21(B) exception?
 
Fred B

Fred B

Senior Member
Location
Upstate, NY
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Electrician
What does the sections A or B say?
(A) is under 112.5 kVA (B) is for over 112.5 kVA, so what section you believe should apply? Additionally 450.21 specifically state this sections application is to indoor installation so neither would apply to you installation. You need to read further on to get to outdoor installations of dry type transformers.
 
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hhsting

Senior Member
Location
Glen bunie, md, us
Occupation
Junior plan reviewer
Fred B said:
What does the sections A or B say?
(A) is under 112.5 kVA (B) is for over 112.5 kVA, so what section you believe should apply? Additionally 450.21 specifically state this sections application is to indoor installation so neither would apply to you installation. You need to read further on to get to outdoor installations of dry type transformers.
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. Missed the big heading 450.21 that says for indoor type. Thanks

I looked downstream but did not find section for outdoor dry type transformer 150kva??
 
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