Type DH plug-in and feeder busway distributes power through a wide variety of indoor locations where there is a need for smallblocks of conveniently available power. Type DH busway has a lower installed cost than wire and conduit, yet has all the advantages and features of plug-in busway. Available Ratings: 100 amperes, 600 volts, indoor enclosures only TSST ECTB SBE 100A 3P4W CU