A field installed tap is made into a feeder that has a 400 amp over current device protecting it. The tap is 10′ long. The ampacity of the tap conductors is not less than ___ amps.

A field installed tap is made into a feeder that has a 400 amp over current device protecting it. The tap is 10′ long. The ampacity of the tap conductors is not less than ___ amps.