Standard Historical Last Updated: Jan 09, 2012 Track Document
ASTM D4566-08

Standard Test Methods for Electrical Performance Properties of Insulations and Jackets for Telecommunications Wire and Cable

Standard Test Methods for Electrical Performance Properties of Insulations and Jackets for Telecommunications Wire and Cable D4566-08 ASTM|D4566-08|en-US Standard Test Methods for Electrical Performance Properties of Insulations and Jackets for Telecommunications Wire and Cable Standard new BOS Vol. 10.02 Committee D09
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Significance and Use

Electrical tests, properly interpreted, provide information with regard to the electrical properties of the insulation. The electrical test values give an indication as to how the insulation will perform under conditions similar to those observed in the tests. Electrical tests may provide data for research and development, engineering design, quality control, and acceptance or rejection under specifications.


1.1 These test methods cover procedures for electrical testing of thermoplastic insulations and jackets used on telecommunications wire and cable and for the testing of electrical characteristics of completed products. To determine the procedure to be used on the particular insulation or jacket compound, or on the end product, reference should be made to the specification for the product.

1.2 The test methods appear in the following sections of this standard:

Test MethodSections
Electrical Tests of InsulationIn-Process4-8
DC proof test8
Insulation defect or fault rate7
Spark test6
Electrical Tests of Completed Wire and Cable9-51
Attenuation, effects due to aging31
Attenuation, effects due to elevated temperature29
Attenuation, effects due to humidity30
Attenuation to crosstalk ratiofar end (ACR-F)28
Attenuation to crosstalk rationear end (ACR-N)26
Capacitance deviation19
Capacitance difference20
Capacitance unbalance, Pair-to-ground (CUPG)22
Capacitance unbalance, Pair-to-pair (CUPP)21
Capacitance unbalance, Pair-to-support wire23
Characteristic ImpedanceMethod 1 Propagation constant
and capacitance
Characteristic ImpedanceMethod 2, Single-ended
Characteristic ImpedanceMethod 3 Least Squares Function Fit49
Coaxial capacitance (capacitance to water)17
Conductor continuity11
Conductor resistance (CR)13
Conductor resistance unbalance (CRU of pairs)15
Continuity of other metallic elements12
Crosses test (continuity between wires of different pairs)35
Crosstalk loss, far-end27
Crosstalk loss, near-end25
DC proof test, Core-to-internal shield (screen)40
DC proof test, Core-to-shield38
DC proof test, Core-to-support wire39
DC proof test, Internal shield (screen)-to-shield41
DC proof test, Other required isolations42
DC proof test, Wire-to-wire37
Fault rate test (air core only)33
Insulation resistance (IR)32
Jacket voltage breakdown rating test36
Mutual capacitance (CM)18
Mutual conductance16
Phase Constant44
Phase Delay45
Phase Velocity46
Resistance of other metallic cable elements14
Shorts test (continuity between wires of a pair)34
Structural Return Loss and Return Loss50
Unbalance attenuation (conversion losses)51
Voltage surge test43

1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.

1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Specific hazard statements are given in Sections 6 and 37.

4.1 In-process electrical tests are used primarily as process control tools in an attempt to minimize the number and magnitude of problems detected at final test of completed cable.

9.1 Electrical tests of completed wire and cable may include verification of some or all of the properties in accordance with Sections 11 through 51.

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Book of Standards Volume: 10.02
Developed by Subcommittee: D09.18
Pages: 29
DOI: 10.1520/D4566-08
ICS Code: 29.035.01