Code Quiz: Ampacities of Conductors Rated 2,001V to 35kV

NEC guidelines on ampacities of conductors for underground circuits.

Fill in the blanks with the appropriate answer.

When determining ampacities of conductors for underground circuits rated between 2,001V and 35,000V, where burial depths are modified from the values shown in a figure or table and where burial depths are increased in part(s) of an electrical duct run, no ________ in ampacity of the conductors is needed, provided the total length of parts of the duct run increased in depth is less than __ % of the total run length.


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