GB/T 18015.3-2025Multicore and symmetrical pair/quad cables for digital communications - Part 3: Work area cable - Sectional specification (English PDF)

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1: Structure and Drafting Rules of Standardization Documents".

Drafting.

This document is Part 3 of GB/T 18015 "Twisted or Star-Twisted Multi-Core Symmetrical Cables for Digital Communication". GB/T 18015 has been issued.

The following parts were laid out.

---Part 1: General Specifications;

---Part 11: General Specifications for Competency Accreditation;

---Part 2: Horizontal Cabling Cables with Twisted Pair or Star-Shaped Symmetrical Cables and Transmission Characteristics of 100MHz and Below specification;

---Part 21: Detailed Specifications for Blanking Cables in Horizontal Cabling Layers;

---Part 22: Horizontal Cabling Cable Capability Approval Specification;

---Part 3: Work Area Cabling Cable Specifications;

---Part 31: Detailed Specifications for Blank Cabling in Work Areas;

---Part 32: Work Area Cabling Capability Approval Specification;

---Part 4: Specifications for Vertical Cabling Cables;

---Part 41: Detailed Specifications for Vertical Cabling Cable Blanks;

---Part 42: Vertical Cabling Cable Capability Accreditation Specification;

---Part 5: Horizontal Cabling Cables with Twisted Pair or Star-Shaped Symmetrical Cables and Transmission Characteristics of 1000MHz and Below specification;

---Part 6: Work Area Cabling Cables for Twisted Pair or Star-Twisted Symmetrical Cables with Transmission Characteristics of 1000MHz and Below specification;

---Part 7: Twisted-pair or star-twisted symmetrical cables for digital and analog communication with transmission characteristics of 1200MHz and below specification;

---Part 8: Work Area Cabling Cables for Twisted Pair or Star-Shaped Symmetrical Cables with Transmission Characteristics of 1200MHz and Below specification.

This document replaces GB/T 18015.3-2007 "Digital Communication - Twisted Pair or Star-Twisted Multi-Core Symmetrical Cables - Part 3: Work Area Wiring" Compared with GB/T 18015.3-2007, the "Cable Specification" has the following main technical changes, in addition to structural adjustments and editorial modifications.

a) The cable configuration within the scope has been changed (see Chapter 1, 1.1 of the 2007 edition);

b) PVC material has been removed from the insulation materials list (see 2.2.4 in the 2007 edition);

c) The shielding requirements for cable components have been changed (see 5.2.3, 2.2.7 of the 2007 version);

d) The requirement for the fill factor in the cable core shielding has been removed (see 2.2.9 of the 2007 edition);

e) An additional requirement has been added regarding the unbalanced resistance between wire pairs (see 6.2.2.2);

f) The requirements for capacitor imbalance have been changed (see 6.2.6, 3.2.6 in the 2007 version);

g) The test results requirements for dielectric strength have been increased (see 6.2.3);

h) The test results requirements for insulation resistance have been changed (see 6.2.4, 3.2.4 in the 2007 edition);

i) The requirements for capacitor imbalance have been changed (see 6.2.6, 3.2.6 in the 2007 version);

j) The transfer impedance requirements have been changed (see 6.2.7, 3.2.7 of the 2007 edition);

k) Category 4 cables have been removed (see 3.3 in the 2007 edition);

l) The phase delay requirements have been changed (see 6.3.2, 3.3.1.1 in the 2007 version);

m) The test requirements for phase delay difference have been changed (see 6.3.2.2.1, 3.3.1.2 in the 2007 version);

(n) The temperature range for environmental impact has been changed (see 6.3.2.2.2, 3.3.1.2.1 in the 2007 edition);

o) The attenuation requirements have been changed (see 6.3.3, 3.3.2 in the 2007 version);

p) The requirements for near-end crosstalk have been changed (see 6.3.5, 3.3.4 in the 2007 version);

q) The requirement for remote crosstalk has been removed (see 3.3.5 in the 2007 version);

r) The characteristic impedance requirements have been changed (see 6.3.7, 3.3.6 in the 2007 edition);

s) The return loss requirements have been changed (see 6.3.8, 3.3.7 in the 2007 edition);

t) Structural return loss has been removed (see 3.3.7 in the 2007 edition);

u) The requirements for conductor elongation at break have been changed (see 6.4.2, 3.3.11 in the 2007 edition);

v) The requirements for repeated bending tests of cables have been changed (see 6.4.8, 3.4.8 in the 2007 edition).

This document is modified to adopt IEC 61156-3:2008 "Twisted or star-twisted multi-core symmetrical cables for digital communication - Part 3: Work area wiring".

Cable specifications.

This document has undergone significant structural adjustments compared to IEC 61156-3:2008.A comparison of the structural numbering changes between the two documents is provided below.

See Appendix A for the table.

The technical differences between this document and IEC 61156-3:2008, and the reasons therefor, are as follows.

--- Replace the normative reference IEC 60304 with GB/T 6995.2 (see 5.2.2.2) to conform to the scope of this document;

--- Replace the normative reference IEC 60344 with GB/T 18213 (see 6.2.1) to conform to the actual application situation in my country;

--- Replace the normative reference IEC 61156-1:2002 with IEC 61156-1:2023 (see Chapter 3, Chapter 4, 5.2.3.2).

5.2.5, Chapter 6), to adapt to the latest IEC standards;

--- Replace the normative reference IEC 61156-3-1 with the informative reference GB/T 18015.31 (see Chapter 7), and other sub-specifications.

Maintain consistency;

---Change the cable's operating temperature range from "-40°C~60°C" to "-20°C~60°C" (see Chapter 4) to comply with...

The indoor use environment specified in this document is consistent with the requirements of GB/T 18015.6;

---PVC material has been removed from the list of insulating materials (see 2.2.4 in IEC 61156-3:2008) to improve product safety.

grade;

---Move Note 3 of 3.3.6 in IEC 61156-3:2008 to 6.1 of this document, and change the note to a requirement (see 6.1), and...

The other sub-specifications of GB/T 18015 are consistent with those of GB/T 18015;

---The requirement for unbalanced resistance between wire pairs (see 6.2.2.2) is added to ensure the consistency of resistance between wire pairs;

---A new test requirement has been added for dielectric strength. "The test result should not break down" (see 6.2.3). The original text lacked this requirement for the test result.

---The minimum insulation resistance value has been changed to 5000 Mohm·km (see 6.2.4) to improve the product's safety performance and in accordance with...

The other sub-specifications of GB/T 18015 are consistent with those of GB/T 18015;

---An 800Hz test frequency for capacitance imbalance to ground has been added (see 6.2.6) to meet current technical standards and market requirements, and it is consistent with other sub-specifications of GB/T 18015;

---The requirement for capacitance imbalance to ground is changed from 1700pF/500m to 1600pF/1000m (see 6.2.6) to comply with existing regulations.

Technical standards and market requirements, and consistent with other sub-specifications of GB/T 18015;

---The frequency point requirement for transfer impedance has been increased (see 6.2.7) to meet current technological levels and market requirements;

---The note in the transfer impedance section (see IEC 61156-3:2008, section 3.2.7) has been deleted; the length requirement in the note was incorrect.

---The starting frequency for the phase delay difference was changed from 1MHz to 2MHz (see 6.3.2.2.1) to ensure consistency with the phase delay test frequency.

The phase delay difference is consistent because it is calculated from the phase delay.

---The temperature range for the phase delay difference (see 6.3.2.2.1) has been changed from (-40±1)°C to (-20±1)°C to conform to this document.

Regulations for indoor use environment;

---The temperature range for environmental impact has been changed from "-40°C~ 60°C" to "-20°C~ 60°C" (see 6.3.2.2.2) to conform to...

Suitable for indoor use environments as specified in this document;

---The requirement for structural return loss (see 3.3.6 in IEC 61156-3-2008) has been removed to conform to current technology levels and market demands.

The requirements are to be consistent with other sub-specifications of GB/T 18015;

---The requirement for return loss has been added (see 6.3.7). Return loss reflects the uniformity of the cable structure and its compatibility with the system.

Important parameters should be tested.

The following editorial changes have been made to this document.

---The cable operating temperature range requirements in section 1.1 of IEC 61156-3:2008 are merged with the same content in section 1.3 (see Chapter 4);

---The note in 2.2.5 of IEC 61156-3:2008 has been moved to the main text of 5.2.2.2 in this document to better suit my country's actual national conditions.

(See 5.2.2.2);

---Replace Note 1 and Note 2 in 3.3.6 of IEC 61156-3:2008 with Note 1 and Note 2 in 6.1 of this document (see 6.1);

---The note in 3.2.3 of IEC 61156-3:2008 has been moved to the main text for clearer description, and it also aligns with other sub-specifications of GB/T 18015.

Maintain consistency (see 6.2.3);

---The starting frequency range of the input impedance is corrected from 4MHz to 1MHz to be consistent with the frequency range in Table 3 (see Table 3).

6.3.6.2);

---Added Appendix A (information) "Structure Number Comparison Table".

Please note that some content in this document may involve patents. The issuing organization of this document assumes no responsibility for identifying patents.

This document was proposed by the China Electrical Equipment Industry Association.

This document is under the jurisdiction of the National Technical Committee on Standardization of Wires and Cables (SAC/TC213).

Introduction

Digital communication multi-core symmetrical cables, whether twisted-pair or star-struck, are widely used in information technology, building cabling, security monitoring, industrial control, and machinery.

Applications include people, vehicle-mounted internet, aircraft, ships, data centers, and rail transportation. In addition to transmitting digital information, these cables can also provide low-voltage power supply.

Electrical function. GB/T 18015 "Twisted-pair or star-struck multi-core symmetrical cables for digital communication" aims to establish the production of symmetrical cables with twisted-pair or star-struck structures.

The basic standard documents for this type of cable product provide a basis for its design, production, acceptance, testing, and certification, and are proposed to consist of twenty-four parts.

constitute.

---Part 1: General Specification. This section aims to specify the general requirements for this type of cable.

---Part 11: General Specifications for Capability Accreditation. The purpose is to establish a general framework and format for accreditation of this type of cable capability.

---Part 12: Electrical transmission characteristics and test methods for twisted-pair/star-stranded symmetrical cables. The purpose is to provide test methods for the electrical transmission characteristics of this type of product.

The transport characteristics provide a theoretical basis and experimental methods.

---Part 14: Evaluation of conductor thermal properties for power transmission in bundled cables under IEEE 802.3 PoE application.

The purpose is to provide a method for evaluating the conductor temperature rise performance of bundled cables in remote Power over Ethernet (PoE) applications based on the IEEE 802.3 standard.

Provides testing methods and calculation formulas.

---Part 2: Specifications for horizontal cabling cables with twisted-pair or star-twisted symmetrical cables having transmission characteristics of 100MHz and below.

The purpose is to provide a basis for the design, production, and testing of horizontal cabling cables of 100MHz and below.

---Part 21: Detailed Specifications for Horizontal Cabling Cable Blanks. The purpose is to define horizontal cabling specifications for 100MHz and below.

The framework and format for detailed cable specifications.

---Part 22: Horizontal Cabling Cable Capability Approval Specification. The purpose is to define the horizontal cabling capability for 100MHz and below.

Requirements for accreditation of cabling and cable capabilities.

---Part 3: Work Area Cabling Cable Specifications. The purpose is to provide specifications for work area cabling cables operating at 100MHz and below.

It serves as a basis for design, production, and testing.

---Part 31: Detailed Specifications for Work Area Cabling and Cable Spacing. The purpose is to define work area cabling specifications for 100MHz and below.

The framework and format for detailed cable specifications.

---Part 32: Work Area Cabling Capability Approval Specification. The purpose is to define the requirements for work areas operating at 100MHz and below.

Requirements for accreditation of cabling and cable capabilities.

---Part 4: Vertical Cabling Cable Specifications. The purpose is to provide design specifications for vertical cabling cables operating at 100MHz and below.

Production, testing, and other evidence.

---Part 41: Detailed Specifications for Vertical Cabling Cables. The purpose is to define the specifications for vertical cabling cables at 100MHz and below.

A detailed and standardized framework and writing format.

---Part 42: Vertical Cabling Cable Capability Approval Specification. The purpose is to define the capability requirements for vertical cabling at 100MHz and below.

Requirements for cable capability approval.

---Part 5: Horizontal Cabling Cable Specifications for Twisted Pair or Star-Twisted Symmetrical Cables with Transmission Characteristics of 1000MHz and Below the purpose is to provide a basis for the design, production, and testing of horizontal cables of 1000MHz and below.

---Part 6: Cable Classification for Working Area Wiring of Twisted Pair or Star-Twisted Symmetrical Cables with Transmission Characteristics of 1000MHz and Below the purpose is to provide a basis for the design, production, and testing of cabling cables for work areas of 1000MHz and below.

---Part 7: Twisted-pair or star-twisted symmetrical cables for digital and analog communication with transmission characteristics of 1200MHz and below Standards. The purpose is to provide a basis for the design, production, and testing of digital and analog communication cables of 1200MHz and below.

---Part 8: Cable Classification for Twisted Pair or Star-Shaped Symmetrical Cables with Transmission Characteristics of 1200MHz and Below in the Work Area the purpose is to provide a basis for the design, production, and testing of cabling cables for work areas of 1200MHz and below.

---Part 9: Specifications for cables used in channels with transmission characteristics of.2000MHz and below. The purpose is to provide specifications for.2000MHz...

It provides design, production, and testing guidelines for cables used in channels and below.

---Part 10: Specifications for patch cord cables with transmission characteristics of.2000MHz and below. The purpose is to provide specifications for patch cord cables with transmission characteristics of.2000MHz and below.

The following jumper cables provide a basis for design, production, and testing.

---Part 111: Specification for horizontal cabling cables with single-pair symmetrical cables having transmission characteristics of 1250MHz and below.

The purpose is to provide a basis for the design, production, and testing of single-pair horizontal cabling cables of 1250MHz and below.

---Part 112: Specification for single-pair symmetrical cable working area cabling with transmission characteristics of 1250MHz and below.

The purpose is to provide a basis for the design, production, and testing of single-pair work area cabling cables for 1250MHz and below.

---Part 113: Specification for horizontal cabling cables with single-pair symmetrical cables having transmission characteristics of 20MHz and below.

The purpose is to provide a basis for the design, production, and testing of single-pair horizontal cabling cables of 20MHz and below.

---Part 114: Specification for single-pair symmetrical cable working area cabling with transmission characteristics of 20MHz and below.

The purpose is to provide a basis for the design, production, and testing of cabling cables for work areas of 20MHz and below.

---Part 115: Horizontal Twisted Pair/Star-Twisted Symmetrical Cables with Transmission Characteristics of 1000MHz and Below and Fire-Resistant Properties Layered cabling specifications. The purpose is to provide horizontal cabling with transmission characteristics of 1000MHz and below while also meeting fire resistance requirements.

Layered cabling cables provide a basis for design, production, and testing.

Digital communication multi-core symmetrical cable with twisted pairs or star strands Part 3: Work Area Cabling Cable Specifications

1 Scope

This document specifies the installation guidelines for symmetrical digital communication cables with transmission characteristics of 100MHz and below, used for work area cabling.

Components, materials, and cable construction, performance, and requirements. This type of cable includes shielded, fully shielded, and unshielded cables with twisted or star-shaped strands.

design.

This document applies to work area cabling systems as defined in ISO/IEC 11801 (all parts), and also to those specified in the corresponding detailed specifications.

Various communication systems have been developed.

The cables specified in this document are suitable for operation under the voltage and current specified in communication systems, but are not suitable for low-resistance cables used in public power supply systems.

On the power supply.

2 Normative references

The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included.

For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies.

This document.

GB/T 6995.2 Methods for Identification Marking of Wires and Cables Part 2: Standard Colors GB/T 18213 Guidelines for Calculating DC Resistance of Unplated and Plated Copper Conductors in Low-Frequency Cables and Wires (GB/T 18213-2025) IEC TR60344:2007, IDT Note. GB/T 18233.1-2022 General cabling for information technology user building complexes – Part 1: General requirements (ISO/IEC 11801-1:2017) MOD);

GB/T 18233.2-2022 General cabling for information technology user buildings – Part 2: Office spaces (ISO/IEC 11801-2:2017) MOD);

GB/T 18233.3-2018 General cabling for information technology user building complexes – Part 3: Industrial building complexes (ISO/IEC 11801-3:2017) IDT);

GB/T 18233.4-2024 General cabling for information technology user buildings – Part 4: Residential (ISO/IEC 11801-4:2017, MOD);

GB/T 18233.5-2018 General cabling for information technology user building complexes – Part 5: Data centers (ISO/IEC 11801-5:2017) IDT);

GB/T 18233.6-2022 General cabling for information technology user building complexes – Part 6: Distributed building facilities (ISO/IEC 11801-6) 2017, MOD).

IEC 61156-1:2023 Multicore symmetrical cable for digital communication – Part 1: General specifications Note. GB/T 18015.1-2017 Twisted-pair or star-struck multi-core symmetrical cables for digital communication - Part 1: General Specification (IEC 61156-1:2009, MOD)

3 Terms and Definitions

The terms and definitions defined in IEC 61156-1:2023 apply to this document.