Motor contribution

[hhsting]

If I have significant motor contribution and short circuit fault current needs to be provided with motor contribution then which NEC 2014 code section can be used to enforce short circuit calculation with motor contributions? 110.9,110.10 or something else

 

[Cybatrex]

The code language found in 110.10 is a general requirement and is not trying to target the electrical engineer specifically. There are many places in the NEC where rules are directed towards an electrical engineer rather than the electrician. For examples, see 310.15(A) first paragraph referencing 310.15(C). See also: 310.60(A), 430.225(B)(1), 645.25, 705.12(D)(2)(3)(d), Annex B.