86642R2 is an indoor 400 A power fuse holder from S&C Electric Company, part of the SM-5S family for medium-voltage switchgear. It is rated for a nominal 14.4 kV (14.4–17 kV range) and supports up to 400 A (400E), designed specifically for indoor fuse compartments using SM-5S end fittings. The 86642R2 functions as the fuse-holding component within SM-5S configurations, housing and connecting high-voltage fuses to protect feeders and transformers in 14.4–17 kV systems.
