ASTM D2768-95

Standard Specification for General-Purpose Ethylene-Propylene Rubber Jacket for Wire and Cable

SCOPE
1.1 This specification covers a weather and ozone-resisting crosslinked compound for use as the outer covering or jacket on insulated wires and cables. The polymer component of this material consists substantially of ethylenepropylene copolymer (EPM) or ethylene-propylene terpolymer (EPDM).
1.2 The values stated in inch-pound units are the standard, except in cases where SI units are more appropriate. The values in parentheses are for information only.

General Information

• Status: Historical
• Publication Date: 14-Feb-1995
• Technical Committee: D09 - Electrical and Electronic Insulating Materials

Relations

• Replaced By: ASTM D2768-95(2001) - Standard Specification for General-Purpose Ethylene-Propylene Rubber Jacket for Wire and Cable (Withdrawn 2007)
• Effective Date: 15-Feb-1995
• Referred By: ASTM F2321-23 - Standard Specification for Flexible and Rigid Insulated Temporary By-Pass Jumpers
• Effective Date: 15-Feb-1995
• Referred By: ASTM F855-23 - Standard Specifications for Temporary Protective Grounds to Be Used on De-energized Electric Power Lines and Equipment
• Effective Date: 15-Feb-1995

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: D 2768 – 95 An American National Standard
Standard Specification for
General-Purpose Ethylene-Propylene Rubber Jacket for
Wire and Cable
This standard is issued under the fixed designation D 2768; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope 2001 through 5000 V phase to phase, the jacket shall meet the
following requirements of Test Methods D 470:
1.1 This specification covers a weather and ozone-resisting
3.1.1 Surface Resistivity—The jacket shall have a surface
crosslinked compound for use as the outer covering or jacket
resistivity equal to or greater than 200 000 MV.
on insulated wires and cables. The polymer component of this
3.1.2 U-Bend Discharge—There shall be no cable failure
material consists substantially of ethylenepropylene copolymer
nor cracks in the jacket when a sample of completed cable is
(EPM) or ethylene-propylene terpolymer (EPDM).
subjected to the U-bend discharge test at 150 V/mil (6 kV/mm)
1.2 The values stated in inch-pound units are the standard,
for at least 6 h.
except in cases where SI units are more appropriate. The values
in parentheses are for information only.
4. Test Applicable for Sunlight and Weather Resistant
Materials
2. Referenced Documents
4.1 The jacket shall retain a minimum of 80 % of its unaged
2.1 ASTM Standards:
tensile strength and elongation after 720 h of exposure in a dual
D 257 Test Methods for D-C Resistance or Conductance of
carbon-arc apparatus. Prepare the specimens in accordance
Insulating Materials
with Test Methods D 470 for physical tests of insulations and
D 470 Test Methods for Crosslinked Insulations and Jackets
jackets. Perform the test in accordance with Practice D 1499
for Wire and Cable
using Method 1 of Practice G 23.
D 1499 Practice for Operating Light- and Water-Exposure
Apparatus (Carbon–Arc Type) for Exposure of Plastics
5. Physical Requirements
G 23 Practice for Operating Light-Exposure Apparatus
5.1 The crosslinked jacket shall conform to the physical
(Carbon-Arc Type) With and Without Water for Exposure
properties specified in Table 1.
of Nonmetallic Materials
6. Sampling
3. Electrical Requirements
6.1 Sample the jacket in accordance with Test Methods
3.1 When used on single conductor nonshielded cables rated
D 470.
7. Test Methods
This specification is unde
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