derating factors must be applied when the number of current - carrying conductors in a wireway exceeds which…

derating factors must be applied when the number of current - carrying conductors in a wireway exceeds which of the\n3\n15\n20\n30
Answer
Brief Explanations:
In electrical engineering, when the number of current - carrying conductors in a wireway exceeds 3, derating factors must be applied to account for increased heat generation and reduced ampacity due to the proximity effect and other factors.
Answer:
A. 3