3M Cold Shrink Silicone Rubber Connector Insulators 8440 .

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3M Cold Shrink Silicone RubberConnector Insulators 8440 SeriesData SheetProductDescriptionMay 20143M Cold Shrink Connector Insulators 8440 Series are open-ended, silicone rubber, tubularsleeves. The sleeves are factory expanded and assembled on a removable supporting plastic core.Each rubber assembly is supplied for field installation in this pre-stretched condition. As the core isunwound, the insulating sleeve shrinks to form a tight seal. Three sizes of Cold Shrink Insulatorscover terminal lug barrels and inline connectors. Collectively, the insulators have an applicationrange of 0.35" (8,86 mm) to 0.95" (24,13 mm) for installations on #6 AWG to 3/0 AWG.Features Simple installation requires only workman's handsNo tools requiredNo heat required for installationSeals tight, retains its resiliency and pressure even after prolonged years of aging and exposureResists moistureWide range, size accommodationResists acids and alkaliesResists ozone and ultraviolet lightResists fluid splashesResists fire - will not support flameOperating temperature range -66ºF to 500ºF ( -55ºC to 260ºC)Applications Primary electrical insulation for all solid dielectric (rubber and plastic) insulated wire and cablesplices rated to 1000 voltsElectrical Aircraft cablesFor indoor and outdoor use, in cable tray or overhead applicationsTop moisture sealing for medium voltage, air insulated connectors and lugsInsulation of secondary splices, copper and aluminum conductorsSheath repairsInsulation of inline conductor transition connectors 1 of 53

3M Cold Shrink Silicone Rubber Connector Insulators 8440 SeriesNot for specifications. Values are typical, not to be considered minimum or maximum.Properties measured at room temperature 73 F (23 C) unless otherwise ropertiesPhysical Property (Test Method)Typical Value US unit (metric)ColorGray100% Modulus (ASTM D 412)180 psi (1,24 MPa)Ultimate Tensile (ASTM D 412)1240 psi (8,55 MPa)Die B Tear (ASTM D 624B)185 psi (1,28 MPa)Hardness (ASTM D 2240)48 Shore ASpecific Gravity1.23Electrical Property (Test Method)Dielectric Strength(ASTM D 149) @ 1,78 mm thicknessDielectric Strength168 hours in H2O @ 194 F (190 C)Typical Value US unit (metric)554 V/mil (21,8 mV/m)543 V/mil (21,4 mV/m)Expanded Silicone Rubber TubeLoose Core EndBPlastic Supporting CoreCable 3.28447-8A3/8”(9,5 mm)minAWG6-22 - 1/01/0 - 3/0Application RangeInches (mm)Max. Dia.Min. Dia.Insulatorfor SealCovers0.5600.30 (7,6)(14,22)0.7200.37 (9,4)(18,29)0.9500.49 (12,4)(24,13)Table 12 of 5DimensionsInches (mm)[A]Length1.4 (36)5.2 (132)1.7 (43)6.2 (158)2.3 (57)6.8 (172)[B]Core I.D.0.68 (17,3)0.84 (21,3)1.07 (27,2)

3M Cold Shrink Silicone Rubber Connector Insulators 8440 SeriesProductSpecificationsEngineering sed metallic connectors joining power cable conductors rated 1000 volts or less shall becovered with 3M Cold Shrink Silicone Tubular Rubber Insulation 8440 Series.The inline connections shall be insulated in accordance with the instructions provided with the3M Cold Shrink Connector Insulator 8443-6, 8445-7.5, and 8447-8. The connecting barrelportion of terminal lugs shall be insulated in accordance with the instructions provided with the3M Cold Shrink Connector Insulators 8443-2, 8445-2.5, and 8447-3.2.A silicone rubber cold shrink connector insulator must be capable of normal operation through atemperature range of 66 F/ -55 C to 500 F/260 C. It must be usable without additional covering oradhesive both indoors and outdoors, in cable tray or overhead applications on cables rated up to1000V. It must be applied without additional heat or flame and, when applied according tomanufacturer's directions, be immediately energizable. It must not support flame or be adverselyaffected by moisture, mild acids or alkalies, ozone or ultraviolet light. It must provide resistance toaircraft fluids and be compatible with all rubber and plastic insulated power cables.Flammability TestThe test for flammability of the 3M Cold Shrink Insulators 8440 Series was conducted withspecimens positioned both vertically and horizontally per specification BSS 7230. The siliconerubber insulation passed the Flammability Test of BSS 7230 without supporting a flame. In addition,these insulators were also subjected to a gas flame test as outlined in paragraph 4.4.15 of MIL-C24643A and met the passing criteria as specified. No fuse was blownduring the one hour flame exposure.Humid EnvironmentTests to verify electrical integrity through conditions of high humidity were run per Mil Standard202- Method B. The test duration was 10 days at 104 F/40 C and 95% RH. Typical test values arefound in Table 2.TestBeforeAfterInsulationResistance3.0 x 10122.5 x 1012Withstand2500 V-rms2500 V-rmsTable 2ResultPassPassUltraviolet ResistanceAfter 1000 hours of testing in a Weather-O-Meter according to Specifications ASTM D750 andASTM G23, the silicone rubber insulation did not exhibit crazing, cracking or change in surfaceappearance.Thermal ShockAssembled units from the fluid resistance test were used for the thermal shock evaluation. Theunits were subjected to 15 cycles of the following thermal shock sequence:1.2.3.4.30 minutes at -66 F/ -55 C5 minutes at 74 F/23 C30 minutes at 500 F/260 C5 minutes at 74 F/23 CThe insulation resistance values and results of test are found in Table 3.3 of 5

3M Cold Shrink Silicone Rubber Connector Insulators 8440 SeriesPerformanceTests(continued)FluidMonsanto L.D.Jet AMIL-L-7808MIL-L-236995% SalineInsulationResistance1.5 x 1013 ohms1.0 x 1012 ohms7.0 x 1012 ohms1.7 x 1012 ohms3.5 x 1012 ohms6.5 x 1012 ohms8.0 x 1012 ohms3.5 x 1012 ohms9.0 x 1012 ohms6.5 x 1012 erBeforeAfterWithstandResult2500 V-rms2500 V-rms2500 V-rms2500 V-rms2500 V-rms2500 V-rms2500 V-rms2500 V-rms2500 V-rms2500 udeElectrical integrity at high at high altitudes was determined by testing to Mil Standard 1344A, Testmethod 1004.1. Typical test values are found in Table 4.Altitude50,00070,000InsulationResistance1.0 x 1011 ohms1.8 x 1012 ohmsWithstand2500 V-rms2500 V-rmsTable 4ResultPassPassHeat AgingInstalled silicone rubber insulators were subjected to an eight hour heat aging test at 500 F/260 C.Other units were subjected to 401 F/205 C for 30 days. The silicone rubber remained resilient andshowed no sign of deterioration.Fluid ResistanceTo determine the effect of a fluid splash on insulated connected assemblies, the units weresubjected to ten cycles of the following test sequence:1. One minute fluid soak2. 24 hour, 74 F/23 C ambient dry3. Insulation resistance measurement4. 2.4 kV-rms withstandResults from the fluid resistance test are found in table 5.Fluid Splash TestInsulation Resistance/2500 V-rms WithstandFluidMonsanto L.D.Jet AMIL-L-7808MIL-L-236995% SalineInitial1.5 x 1013/Pass123.0 x 109 ohms1.2 x 109 ohms2.0 x 1012 ohms1.2 x 1012 ohms8.0 x 1012 ohms 2.5 x 1012 ohms 3.5 x 1012 ohms2.0 x 1012 ohms 5.0 x 1012 ohms 5.0 x 1012 ohms344.0 x 107 ohms1.8 x 107 ohms1.2 x 1012 ohms8.0 x 1011 ohms2.5 x 1012 ohms 4.0 x 1012 ohms 3.5 x 1012 ohms3.0 x 1012 ohms 3.0 x 1012 ohms 4.0 x 1012 ohms568.0 x 106 ohms6.0 x 106 ohms3.0 x 1011 ohms2.0 x 1011 ohms2.0 x 1012 ohms 2.5 x 1012 ohms 6.0 x 1012 ohms1.8 x 1012 ohms 2.0 x 1012 ohms 7.0 x 1012 ohms785.0 x 106 ohms4.0 x 106 ohms1.8 x 1011 ohms1.0 x 1011 ohms1.0 x 1012 ohms 2.5 x 1012 ohms 9.0 x 1012 ohms1.0 x 1011 ohms 1.4 x 1012 ohms 3.0 x 1012 ohms9104.0 x 106 ohms3.5 x 106 ohms1.0 x 1011 ohms7.0 x 1010 ohms6.5 x 1011 ohms 1.0 x 1012 ohms 3.0 x 1012 ohms5.0 x 1011 ohms 1.2 x 1012 ohms 5.0 x 1012 ohms7.2 x 1012/Pass 3.5 x 1012/Pass 8.0 x 1012/Pass 9.0 x 1012/PassTable 54 of 5

3M Cold Shrink Silicone Rubber Connector Insulators 8440 SeriesMaintenanceComponents of 3M Cold Shrink Silicone Rubber Connector Insulators are stable under normalstorage conditions for a period of three years from the date of manufacture. The cold shrinkinsulators are not impaired by freezing or overheating due to the ambient temperatures found instorage or shipping. Normal storage and stock rotation are recommended.Approximate Installed WeightTerminal Lug InsulatorsInline Connector Insulators8443-2Weightoz. (gm)0.123 (3.5)8443-6.5Weightoz. (gm)0.388 (11.0)8445-2.50.190 (.54)8445-7.50.564 (16.0)8447-3.20.335 (9.5)8447-80.776 (22.0)Part No.Part No.Table 6Shelf Life &Storage3M Cold Shrink Silicone Rubber Connector Insulators 8440 Series have a 3-year shelf life fromdate of manufacture when stored in a humidity controlled storage (10 C/50 F to 27 C/80 F and 75% relative humidity).AvailabilityPlease contact your local distributor; available from 3M.com/electrical [Where to Buy] or call1.800.245.3573.3M is a trademark of 3M Company.Important NoticeAll statements, technical information, and recommendations related to 3M’s products are based on information believed to be reliable,but the accuracy or completeness is not guaranteed. Before using this product, you must evaluate it and determine if it is suitable foryour intended application. You assume all risks and liability associated with such use. Any statements related to the product, which arenot contained in 3M’s current publications, or any contrary statements contained on your purchase order, shall have no force or effectunless expressly agreed upon, in writing, by an authorized officer of 3M.Warranty; LimitedRemedy; LimitedLiabilityThis product will be free from defects in material and manufacture at the time of purchase. 3M MAKES NO OTHER WARRANTIESINCLUDING, BUT NOT LIMITED TO, ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULARPURPOSE. If this product is defective within the warranty period stated above, your exclusive remedy shall be, at 3M’s option, toreplace or repair the 3M product or refund the purchase price of the 3M product. Except where prohibited by law, 3M will not beliable for any indirect, special, incidental or consequential loss or damage arising from this 3M product, regardless of thelegal theory asserted.3MElectrical Markets Division6801 River Place Blvd.Austin, TX 78726-9000800.245.3573FAX: 800.245.0329www.3M.com/electricalPlease recycle 3M 2014 All rights reserved78-8124-5813-7 Rev C5 of 5

specimens positioned both vertically and horizontally per specification BSS 7230. The silicone rubber insulation passed the Flammability Test of BSS 7230 without supporting a flame. In addition, these insulators were also subjected to a gas flame test as outlined in paragraph 4.4.15 of MIL-C-24643A and met the passing criteria as specified. No fuse was blown during the one hour flame exposure .

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