A fuse assembly includes a housing having a base, side and end walls and a removable cover. Studs extend through the base and a current limiting fuse is connected between the studs. The cover, which has an edge gasket, is held against the side and end walls by fasteners which extend through the cover and threadedly engage the studs, the fasteners having enlarged heads to press against the outer surface of the cover and hold it firmly in place, forming a sealed interior chamber for the fuse. A locking filament inhibits unscrewing the fasteners.