8420 Series insulators are open ended tubular rubber sleeves
Factory expanded and assembled on a removable core they are supplied for field installation
Once positioned for installation the core is removed allowing the tube to shrink and create a waterproof seal
Features and Benefits：
; Easily installed ; Suitable for various cable sizes ; Torches or heat not required ; Good thermal stability ; Tight seal ; Resilience and pressure remain consistent after years of ageing and exposure ; Excellent wet electrical properties ; Tough rubber formulation ; Waterproof ; Fungus resistant ; Acid and alkalis resistance ; Ozone and ultra violet light resistance
Applications：
; Primary electrical insulation for all solid dielectric insulated wire （rubber and plastic） and cable splices with 1000 V rating ; Direct burial or submersed ; Indoor, outdoor or overhead use ; Provides physical and moisture sealing protection for high-voltage air insulated connectors and lugs
Examples - Spacer cable and lug connections to busbar ; Secondary splice copper or aluminium conductor insulation ; Service relocation ; Inline conductor transition connector insulation
