The enclosed TeSys D offer accepts standard TeSys D accessories and all Insta-Kits control units and control power transformer kits. Standard capacity control power transformers with built-in fuse block can be installed in the standard enclosure. This unit is a 1 operator, OFF/ON selector switch with a black handle. The switch is rated 480VAC and compatible with NEMA 1 or 12 enclosures. This unit is IEC certified.