ASTM D2655-00
(Specification)Standard Specification for Crosslinked Polyethylene Insulation for Wire and Cable Rated 0 to 2000 V
Standard Specification for Crosslinked Polyethylene Insulation for Wire and Cable Rated 0 to 2000 V
SCOPE
1.1 This specification covers a crosslinked polyethylene insulation for electrical wires and cables in conductor sizes 14 AWG (2.08 mm2) and larger. The base polymer of this insulation consists substantially of polyethylene or a polyethylene copolymer.
1.2 This type of insulation is suitable for continuous use on power cables in wet and dry locations, for voltage ratings not exceeding 2000 V and at conductor temperatures not exceeding 90oC for normal operation. For copper conductors, the insulation may be applied over the uncoated metal.
1.3 Materials covered by this specification are not sunlight and weather resistant unless they are carbon black pigmented or contain an additive system designed for this protection.
1.4 In many instances the insulation cannot be tested unless it has been formed around a conductor. Therefore, tests are done on insulated wire in this standard solely to determine the relevant property of the insulation and not to test the conductor or completed cable.
1.5 Whenever two sets of values are presented, in different units, the values in the first set are the standard, while those in parentheses are for information only.
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An American National Standard
Designation: D 2655 – 00
Standard Specification for
Crosslinked Polyethylene Insulation for Wire and Cable
Rated 0 to 2000 V
This standard is issued under the fixed designation D 2655; 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 of Polymeric Insulations
1.1 This specification covers a crosslinked polyethylene
3. Terminology
insulation for electrical wires and cables in conductor sizes 14
3.1 Definitions:
AWG (2.08 mm ) and larger. The base polymer of this
3.1.1 For definitions of terms used in this specification refer
insulation consists substantially of polyethylene or a polyeth-
to Terminology D 1711.
ylene copolymer.
3.2 Definitions of Terms Specific to This Standard:
1.2 This type of insulation is suitable for continuous use on
3.2.1 aging (act of), n—exposure of materials to air at
power cables in wet and dry locations, for voltage ratings not
121°C for 168 h.
exceeding2000Vandatconductortemperaturesnotexceeding
90°C for normal operation. For copper conductors, the insula-
4. Physical Properties
tion may be applied over the uncoated metal.
4.1 The requirements for the insulation are listed in Table 1.
1.3 Materials covered by this specification are not sunlight
and weather resistant unless they are carbon black pigmented
5. Electrical Requirements
or contain an additive system designed for this protection.
1.4 In many instances the insulation cannot be tested unless
TABLE 1 Physical Properties for Crosslinked Polyethylene
it has been formed around a conductor. Therefore, tests are
Insulation
done on insulated wire in this standard solely to determine the
Unaged Requirements:
relevant property of the insulation and not to test the conductor
Tensile strength, min, psi (MPa) 1800 (12.4)
or completed cable.
Elongation at rupture, min, % 250
Aged Requirements:
1.5 Whenever two sets of values are presented, in different
After Air Oven Test at 121 6 1°C for 168 h:
units, the values in the first set are the standard, while those in
Tensile strength, min, % of unaged value 75
parentheses are for information only.
Elongation at rupture, min, % of unaged value 75
Heat Distortion:
At 121 6 1°C, max, % of unaged value:
2. Referenced Documents
4/0 Awg (107 mm ) and smaller (insulation on cable) 30
2.1 ASTM Standards:
Larger than 4/0 AWG (107 mm ) (buffed sample of insulation) 15
Percent Hot Creep
D 470 TestMethodsforCrosslinkedInsulationsandJackets
2 Filled 100
for Wire and Cable
Unfilled 175
D 1248 Specification for Polyethylene Extrusion Materials
Percent Hot Set
Filled 5
for Wire and Cable
Unfilled 10
D 1711 Terminology Relating to Electrical Insulation
D 2765 Test Methods for Determination of Gel Content and
Swell Ratio of Crosslinked Ethylene Plastics
5.1 Order of Testing—Perform the ac voltage, insulation
2.2 ICEA Standard:
resistance, and dc voltage tests in that order when any of these
ICEAT-28-562 Test Method for Measurement of Hot Creep
tests are required. The sequence for other testing is not
specified.
1 5.2 AC Voltage Test—Subject wires and cables to an ac test
This specification is under the jurisdiction of ASTM Committee D09 on
voltage for a period of 5 min. Unless otherwise specified, omit
Electrical and Electronic Insulating Materials and is the direct responsibility of
Subcommittee D09.18 on Solid Insulations, Non-Metallic Shieldings, and Cover-
this test if the dc voltage test described in 5.4 is to be
ings for Electrical and Telecommunications Wires and Cables.
Current edition approved Sept. 10, 2000. Published November 2000. Originally
e1
published as D 2655 – 67 T. Last previous edition D 2655 – 95 .
2 5
Annual Book of ASTM Standards, Vol 10.01. Available from Insulated Cable Engineers Association, P. O. Box 440, South
Annual Book of ASTM Standards, Vol 08.01. Yarmouth, MA 02664 or Global Engineering Documents, 15 Inverness Way East,
Annual Book of ASTM Standards, Vol 08.02. Englewood, CO 80112.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
D 2655
performed. Test at a voltage of 100 V/mil (4 kV/mm) based on 6. Heat Distortion
the specified nominal thickness of insulation for the rated
6.1 The requirements for heat distortion are given in Table
circuit voltage, phase to phas
...
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