This standard establishes specifications for high voltage (above 1000 volts) distribution class current limiting type fuses and associated accessories. All of these devices are intended for use on alternating current systems. These specifications apply to the following specific types of equipment: a) Distribution class current limiting type fuses and fuse units. b) Distribution class current-limiting fuse disconnecting switches. c) Items (a) thru (b) used in fuse enclosure packages (FEP) (see types listed in Clause 1.1 below) d) Fuse supports, fuse units, refill units and fuse mountings of the type used exclusively with distribution class current limiting type fuses, and fuse disconnecting switches. e) Removable switch blades of the type used exclusively with distribution class current limiting type fuses, and fuse disconnecting switches.