I have a situation where we are removing some 480V equipment (4/0 conductors) the owner wants the cables removed to an adjacent j-box as a emergency just in case ckt. or for future use. With the availability of someone accidentally energizing the feeder what are some percusations to take in order to insulate the conductor in the pull box is taping adequate of is there some kind of ?boot? 600V class I could utilize? Unless someone makes a wirenut for a 4/0 conductor..