ASTM D2770-01

Standard Specification for Ozone-Resisting Ethylene-Propylene Rubber Integral Insulation and Jacket for Wire and Cable (Withdrawn 2007)

SCOPE
1.1 This specification covers a weather- and ozoneresisting vulcanized rubber integral insulation and jacket compound for electrical wires and cables. The rubber polymer shall consist substantially of ethylenepropylene copolymer (EPM) or of ethylenepropylene terpolymer (EPDM).  
1.2 This type insulation is considered suitable for use on wire or cable which will be used for continuous operation at conductor temperatures up to 90°C in dry locations and 75°C in wet locations, and at operating voltages not exceeding 2000 V.
1.3 The values stated in inch-pound units, except for temperature, are regarded as the standard. The values in parentheses are for information only.
WITHDRAWN RATIONALE
This specification covers a weather- and ozone-resisting vulcanized rubber integral insulation and jacket compound for electrical wires and cables. The rubber polymer shall consist substantially of ethylenepropylene copolymer (EPM) or of ethylenepropylene terpolymer (EPDM).
Formerly under the jurisdiction of Committee D09 on Electrical and Electronic Insulating Materials, this specification was withdrawn without replacement in October 2007 because the committee was unsure of the utility of this document to the industry and did not wish to maintain a document for which there may be little or no expertise on the committee.

General Information

• Status: Withdrawn
• Publication Date: 09-Sep-2001
• Withdrawal Date: 17-Oct-2007
• ICS: 29.035.20 - Plastics and rubber insulating materials
• Technical Committee: D09 - Electrical and Electronic Insulating Materials

Relations

• Replaces: ASTM D2770-93 - Standard Specification for Ozone-Resisting Ethylene-Propylene Rubber Integral Insulation and Jacket for Wire and Cable
• Effective Date: 10-Sep-2001
• Referred By: ASTM F2321-23 - Standard Specification for Flexible and Rigid Insulated Temporary By-Pass Jumpers
• Effective Date: 10-Sep-2001
• Referred By: ASTM F855-23 - Standard Specifications for Temporary Protective Grounds to Be Used on De-energized Electric Power Lines and Equipment
• Effective Date: 10-Sep-2001

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
An American National Standard
Designation: D 2770 – 01
Standard Specification for
Ozone-Resisting Ethylene-Propylene Rubber Integral
1
Insulation and Jacket for Wire and Cable
This standard is issued under the fixed designation D 2770; 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.
TABLE 1 Physical Test Requirements for EPM or EPDM Integral
1. Scope
Insulation and Jacket
1.1 This specification covers a weather- and ozoneresisting
Physical Requirements (original):
vulcanized rubber integral insulation and jacket compound for
Tensile stress at 100 % elongation, min, psi (MPa) 500 (3.4)
electrical wires and cables. The rubber polymer shall consist
Tensile strength, min, psi (MPa) 1200 (8.3)
Elongation at rupture, min, % 150
substantially of ethylenepropylene copolymer (EPM) or of
Physical Requirements [After heat exposure (aging) in
ethylenepropylene terpolymer (EPDM).
an air oven at 121 6 1°C for 168 h]:
1.2 This type insulation is considered suitable for use on Tensile strength, min, % of original 75
Elongation at rupture, min, % of original 75
wire or cable which will be used for continuous operation at
conductor temperatures up to 90°C in dry locations and 75°C
in wet locations, and at operating voltages not exceeding 2000
4. Electrical Requirements Electrical Requirements
V.
1.3 The values stated in inch-pound units, except for tem- 4.1 Order of Testing—Perform the ac voltage withstand,
insulation resistance, and dc voltage withstand tests in that
perature, are regarded as the standard. The values in parenthe-
ses are for information only. order when any of these tests are required. The sequence for
other testing is not specified.
2. Referenced Documents
4.2 AC Voltage Withstand Test—Each length of integrally
2.1 ASTM Standards: covered conductor shall withstand for 5 min the ac voltage
D 470 Test Methods for Crosslinked Insulations and Jackets specified in Table 2, unless the dc test in 4.4 is performed.
2
for Wire and Cable 4.3 Insulation Resistance—The integrally covered conduc-
tor shall have an insulation resistance not less than that
3. Physical Properties
correspondingtoaconstantof10 000at60°F(15.6°C).Where
3.1 The crosslinked integral covering shall conform to the
the temperature of the water in which the insulation is tested
requirements for physical properties specified in Table 1.
differs from 60°F, the measured value obtained shall be
3.2 Thickness of Insulation—The average thickness of the
multiplied by the proper correction factor for the particular
insulation shall be not less than that given in Table 2. The
compound as previously determined by the manufacturer.
minimum thickness shall be not less than 90 % of the specified 4.4 DC Voltage Withstand Test—Upon completion of the
thickness.
insulation resistance test, each length of integrally covered
conductor shall withstand for 5 min the dc test voltage
specified in Table 2 unless the ac test described in 4.2 is
performed.
1
This specification is under the jurisdiction of ASTM Committee D09 on
4.5 Accelerated Water Absorption—The integral covering
Electrical and Electronic Insulating Materials and is
...