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ASTM D4566 - 20
Standard Test Methods for Electrical Performance Properties of Insulations and Jackets for Telecommunications Wire and Cable
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Significance and Use
6.1 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 provide data for research and development, engineering design, quality control, and acceptance or rejection under specifications.
1. Scope
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 These test methods appear in the following sections of this standard:
| Test Method | Sections |
| Electrical Tests of Insulation—In-process | 5 – 9 |
| DC proof test | 9 |
| Insulation Defect or Fault Rate | 8 |
| Spark Test | 7 |
| Electrical Tests of Completed Wire and Cable | 10 – 52 |
| Attenuation | 25 |
| Attenuation, Effects Due to Aging | 32 |
| Attenuation, Effects Due to Elevated Temperature | 30 |
| Attenuation, Effects Due to Humidity | 31 |
| Attenuation to Crosstalk Ratio—Far End (ACR-F) | 29 |
| Attenuation to Crosstalk Ratio—Near End (ACR-N) | 27 |
| Capacitance Deviation | 20 |
| Capacitance Difference | 21 |
| Capacitance Unbalance, Pair-to-ground (CUPG) | 23 |
| Capacitance Unbalance, Pair-to-pair (CUPP) | 22 |
| Capacitance Unbalance, Pair-to-support Wire | 24 |
| Characteristic Impedance—Test Method 1: Propagation Constant and Capacitance | 48 |
| Characteristic Impedance—Test Method 2: Single-ended Measurements | 49 |
| Characteristic Impedance—Test Method 3: Least Squares Function Fit | 50 |
| Coaxial Capacitance (Capacitance to Water) | 18 |
| Conductor Continuity | 12 |
| Conductor Resistance (CR) | 14 |
| Conductor Resistance Unbalance (CRU of Pairs) | 16 |
| Continuity of Other Metallic Elements | 13 |
| Crosses Test (Continuity Between Wires of Different Pairs) | 36 |
| Crosstalk Loss, Far-end | 28 |
| Crosstalk Loss, Near-end | 26 |
| DC Proof Test, Core-to-internal Shield (Screen) | 41 |
| DC Proof Test, Core-to-shield | 39 |
| DC Proof Test, Core-to-support Wire | 40 |
| DC Proof Test, Internal Shield (Screen)-to-shield | 42 |
| DC Proof Test, Other Required Isolations | 43 |
| DC Proof Test, Wire-to-wire | 38 |
| Fault Rate Test (Air Core Only) | 34 |
| Insulation Resistance (IR) | 33 |
| Jacket Voltage Breakdown Rating Test | 37 |
| Mutual Capacitance (CM) | 19 |
| Mutual Conductance | 17 |
| Phase Constant | 45 |
| Phase Delay | 46 |
| Phase Velocity | 47 |
| Resistance of Other Metallic Cable Elements | 15 |
| Shorts Test (Continuity Between Wires of a Pair) | 35 |
| Structural Return Loss and Return Loss | 51 |
| Unbalance Attenuation (Conversion Losses) | 52 |
| Voltage Surge Test | 44 |
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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. Specific hazard statements are given in Sections 7 and 38.
1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
ANSI Standard
ANSI/IEEE Standard 100 IEEE Standard Dictionary of Electrical and Electronics Terms Available from Global Engineering Documents, 15 Inverness Way, East Englewood, CO 80112-5704, http://www.global.ihs.com.ASTM Standards
B193 Test Method for Resistivity of Electrical Conductor Materials
D150 Test Methods for AC Loss Characteristics and Permittivity (Dielectric Constant) of Solid Electrical Insulation
D1711 Terminology Relating to Electrical Insulation
D2633 Test Methods for Thermoplastic Insulations and Jackets for Wire and Cable
D3426 Test Method for Dielectric Breakdown Voltage and Dielectric Strength of Solid Electrical Insulating Materials Using Impulse Waves
D5423 Specification for Forced-Convection Laboratory Ovens for Evaluation of Electrical Insulation
E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
IEC Standard
IEC 61156-1 Multicore and Symmetrical Pair/Quad Cables for Digital CommunicationsPart 1: Generic SpecificationICS Code
ICS Number Code 29.035.01 (Insulating materials in general)
UNSPSC Code
UNSPSC Code 26121616(Telecommunications cable)
Referencing This Standard
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DOI: 10.1520/D4566-20
Citation Format
ASTM D4566-20, Standard Test Methods for Electrical Performance Properties of Insulations and Jackets for Telecommunications Wire and Cable, ASTM International, West Conshohocken, PA, 2020, www.astm.org
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