3M Cold Shrink Connector Insulators 8420 Series Data Sheet October 2015 Product 3M Cold Shrink Connector Insulators 8420 Series are open-ended, tubular, rubber sleeves which Description are factory expanded and assembled onto a removable core. The core is removed after the tube has been positioned for installation over an inline connection, terminal lug, etc., allowing the tube to shrink and form a water-resistant seal. The insulating tube is made of EPDM rubber which does not contain chlorides or sulfur. Six diameter sizes will cover a range of cable up to 1000 volts for copper and aluminum conductors from 10 AWG through 1000 kcmil. To extend the useful life of this product in applications which are continuously exposed to high levels of ultra-violet radiation, overwrap with Scotch Super 33+ Vinyl Electrical Tape or Scotch Self- Fusing Silicone Rubber Electrical Tape 70. Features Simple installation requires no tools Accommodates a wide range of cable sizes No torches or heat required Good thermal stability Seals tight retains its resiliency and pressure even after prolonged years of aging and exposure Excellent wet electrical properties Tough rubber formulation withstands backfilling Water-resistant Meets the water seal requirements of ANSI C119.1 No mastic or tape required to seal Resists acids and alkalis resists ozone Operating temperature range: -40F to 194F (-40C to 90C) Applications Primary electrical insulation for all solid dielectric (rubber and plastic) insulated wire and cable splicing rated up to 1000 volts Direct burial and submersible For indoor and outdoor use Physical protection and moisture sealing for air-insulated connectors and lugs such as spacer cable and lug connections to bus bar Insulation of secondary splices, copper or aluminum conductors Relocation of service Dig-in repairs Sheath repairs Environmental sealing for communication and other non-electrical applications Insulation of inline conductor transition connectors (see Figure 1) 3M Cold Shrink Connector Insulator 8426 2/0 4/0 15/16 Connector Figure 1 1 of 3 3 3M Cold Shrink Connector Insulators 8420 Series Typical Not for specifications. Values are typical, not to be considered minimum or maximum. Physical Properties measured at room temperature 73F (23C) unless otherwise stated. and Electrical EPDM Rubber Properties Typical Value Physical Properties (Test Method) US units (metric) Color Black 300% Modulus 480 psi (ASTM D 41275) (3,3 MPa) Ultimate Tensile 1400 psi (ASTM D 41275) Original (9,6 MPa) Ultimate Elongation 750% (ASTM D 41275) Original Die C Tear 150 pli (ASTM D 624C73) Original (26,3 KN/m) Moisture Absorption wt. gain 7 days 90 C (194 F) H O 1.8% 2 Typical Value Electrical Properties (Test Method) US units (metric) Dielectric Strength 365 v/mil (ASTM D 14975) Original (14,3 Mv/m) 1,78 mm 7 days in H2O at 282 v/mil 90 C (194 F) (11,1 Mv/m) 3M Cold Shrink Connector Insulator Selection Table Product Diameter Range (Minimum Conductor Sizes Relaxed Tube Length Inches Product Number Maximum)* Inches (mm) AWG & Kcmil (mm) 84236 6 4 0.31 0.56 (7,80 14,3) 6.0 (152) 84248 10 1/0** 0.10 0.82 (2,54 20,9) 8.0 (203) 84258 2 1/0 0.40 0.82 (10,1 20,9) 8.0 (203) 84269 2/0 250 0.55 1.18 (13,9 30,1) 9.0 (229) 842611 2/0 250 0.55 1.18 (13,9 30,1) 11.0 (279) 84276*** 0.67 1.38 (16,8 35,1) 6.0 (152) 842712 250 400 0.67 1.38 (16,8 35,1) 12.0 (305) 842716 250 400 0.67 1.38 (16,8 35,1) 16.0 (406) 84286*** 0.95 1.94 (24,0 49,3) 6.0 (152) 842812 450 800 0.95 1.94 (24,0 49,3) 12.0 (305) 842818 450 800 0.95 1.94 (24,0 49,3) 18.0 (457) 84296*** 1.27 2.67 (32,2 67,8) 6.0 (152) 84299**** 900 1000 1.27 2.67 (32,2 67,8) 9.0 (229) 842912 900 1000 1.27 2.67 (32,2 67,8) 12.0 (305) 842918 900 1000 1.27 2.67 (32,2 67,8) 18.0 (457) 84309*** 1.68 3.69 (42,6 93,7) 9.0 (229) 843018 1250 2000 1.68 3.69 (42,6 93,7) 18.0 (457) NOTES: * Minimum = Seal Diameter Maximum = Connector Clearance Dimension ** Product contains range-extending adapters (Without adapters, 84248/84258 ranges are identical). *** Primary uses: Sealing of terminal lug barrels, conduit couplings and conduittocable breakouts. **** Maximum connector length: 5.625 (For longer connector bodies, select 842912/842918 as needed). IMPORTANT: Use wire insulation/jacket diameters and connector O.D. for final sizing confirmation. 2 of 3