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Silicone Rubber Cold Shrink
Connector Insulators 8440 Series
Data Sheet
3M Cold Shrink Connector Insulators 8440 Series are open
1.0 Product Description
?
ended, silicone rubber, tubular sleeves. The sleeves are factory
expanded and assembled on a removable supporting plastic core.
Each rubber assembly is supplied for field installation in this
3.0 Data: Physical & Electrical Properties
High Stretch Silicone Rubber
Typical Physical Properties
pre-stretched condition. As the core is unwound, the insulating
sleeve shrinks to form a tight seal. Three sizes of Cold Shrink
Insulators cover terminal lug barrels and three sizes of Cold
Shrink Insulators cover inline connectors. Each insulator type,
collectively has an application range of 0.35" (8,86 mm) to 0.95"
(24,13 mm) for installations on #6 AWG to 3/0 AWG.
? Simple installation, requires only workman's hands.
? No tools required.
? No heat required for installation.
? Seals tight, retains its resiliency and pressure even after
years of aging and exposure.
? Resists moisture.
? Wide range, size accommodation.
? Resists acids and alkalies.
? Resists ozone and ultraviolet light.
? Resists fluid splashes.
? Resists fire - will not support flame.
? Operating temperature range - 66o F/ - 55o C to
500oF/260oC.
2.0 Applications
? Primary electrical insulation for all solid dielectric
(rubber and plastic) insulated wire and cable splices
rated to 1000 volts.
? Electrical Aircraft cables.
? For indoor, outdoor, in cable tray for overhead use.
? Physical protection and moisture sealing for high voltage,
air insulated connectors and lugs.
? Insulation of secondary splices, copper and aluminum
conductors.
? Sheath repairs.
? Insulation for inline conductor transition connector.
Page 1 of 4
Test Method
Color
100% Modulus
ASTM D412-75
Ultimate Tensile
ASTM D412-75
Die B Tear
ASTM D624B-73
Shore A Hardness
ASTM D2240-75
Specific Gravity
Permanent Set
100% Strain - 22 hours
@ 212? F/100? C
Dielectric Strength
ASTM D149-75
@1.78 mm thickness
Dielectric Strength
168 hours in H2O
@194?F/90?C
Typical Values
Grey
180 psi
(1.24MPa)
1240 psi
(8.55 MPa)
185 psi
(1.28 MPa)
48
1.23
7.1%
554 Volts/mil
(21.8 MV/m)
543 Volts/mil
(21.4 MV/m)
78-8124-5813-7
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