I have a situation where I client wants to use 500-kcmil THWN copper conductors, 75deg (380A) protected by a 400A OCPD. Please correct me if I am wrong but in accordance to 240.4 this is allowed as long as the calculated load does not exceed the ampacity of the conductors (380A)?
I need help clarifying part (B). The OCPD is 100% rated with adjustable trip unit. Our firms's licensed engineer will not stamp dwgs if the breaker is 100% rated and does not trust that the trip will be adjusted in the field.
again I need understanding what part (B) is stating.
Thanks in advance.
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My email is dean.vanetten@mwgroup.net.
