GB/T 18015.31-2025Multicore and symmetrical pair/quad cables for digital communications - Part 31: Work area wiring - Blank detail 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 31 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 18015.31-2007 "Digital Communication - Twisted Pair or Star-Twisted Multi-Core Symmetrical Cables - Part 31: Working Area Layout" the "Detailed Specification for Blank Cables and Wires" differs from GB/T 18015.31-2007 in that, aside from structural adjustments and editorial changes, the main technical changes are as follows.

as follows.

a) Added terms and definitions (see Chapter 3);

b) The requirements for Category 4 cables have been removed (see Chapter 3 of the 2007 edition);

c) The detailed specification development guidelines have been revised (see Chapter 4, Chapter 3 of the 2007 edition);

d) The requirement for unbalanced resistance between wire pairs has been increased (see Table 1);

e) The dielectric strength requirements have been changed (see Table 1, Chapter 4, 2007 edition);

f) The requirements for capacitor imbalance have been changed (see Table 1, Chapter 4, 2007 edition);

g) The transfer impedance requirements have been changed (see Table 1, Chapter 3, 2007 edition);

h) The attenuation requirements have been changed (see Table 1, Chapter 4, 2007 edition);

i) The requirements for unbalanced decay have been changed (see Table 1, Chapter 4, 2007 edition);

j) The requirements for near-end crosstalk have been changed (see Table 1, Chapter 4, 2007 edition);

k) Remote crosstalk has been removed (see Chapter 4 of the 2007 edition);

l) The characteristic impedance requirements have been changed (see Table 1, Chapter 4, 2007 edition);

m) Increased return loss (see Table 1);

n) Increased size requirements (see Table 1);

o) An insulation thermal aging winding test was added (see Table 1);

p) A high-temperature pressure test for the sheath has been added (see Table 1);

q) Thermal shock testing has been added (see Table 1);

r) Increased flame spread resistance of bundled cables (see Table 1);

s) A combined combustion and smoke test of the cable under ventilated space conditions was added (see Table 1).

This document is modified to adopt IEC 61156-3-1:2009 "Twisted or star-twisted multi-core symmetrical cables for digital communication - Part 3-1.Working area".

Detailed specifications for blank cabling and cable.

This document has undergone significant structural adjustments compared to IEC 61156-3-1:2009.A comparison of the structural numbering changes between the two documents is provided below.

See Appendix A for the table of contents.

The technical differences between this document and IEC 61156-3-1:2009, and the reasons therefor, are as follows.

---The normative reference GB/T 18015.3-2025 has replaced IEC 61156-3, GB/T 18015.3-202X and...

The conformity level of IEC 61156-3:2008 has been modified to adapt to my country's technical conditions;

--- Replace the normative reference IEC 61156-1:2002 with IEC 61156-1:2023 to conform to the latest IEC standard (see Table 1).

---Added terms and definitions (see Chapter 3) to conform to the requirements of the existing standards system;

---The requirement for "shielding/shielding" in dielectric strength has been removed (see Chapter 4 of IEC 61156-3-1:2009), consistent with GB/T 18015.3.

The requirements remain consistent;

---The requirements for capacitor imbalance have been revised (see Table 1) to align with those of GB/T 18015.3;

---The requirements for transfer impedance have been changed (see Table 1) to be consistent with the requirements of GB/T 18015.3;

---Structural return loss (see Chapter 4 of IEC 61156-3-1:2009) has been removed to align with the requirements of GB/T 18015.3;

---The requirements for return loss have been increased (see Table 1), consistent with the requirements of GB/T 18015.3.

The following editorial changes have been made to this document.

---The term "component chromatography" in Table 1 has been changed to "insulation chromatography," correcting an error in the original text of IEC 61156-3-1:2009;

---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: Horizontal Cabling Cable Specifications for Twisted Pair or Star-Twisted Symmetrical Cables with Transmission Characteristics of 100MHz and Below the purpose is to provide a basis for the design, production, and testing of horizontal cabling cables at 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-Shaped 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: Single-pair symmetrical horizontal cabling cable specifications with 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 at 1250MHz and below.

---Part 112: Cable Classification for Single-Pair Symmetrical Cables with Transmission Characteristics of 1250MHz and Below in the Working Area 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 water-resistant cabling with transmission characteristics of 1000MHz and below while also meeting fire resistance requirements.

Flat-floor cabling cables provide a basis for design, production, and testing.

Digital communication multi-core symmetrical cable with twisted pairs or star strands Part 31: Work Area Cabling and Cables Blank detailed specifications

1 Scope

This document specifies the twisted-pair or star-connected multi-core symmetrical working area wiring cables for digital communication with transmission characteristics of 100MHz and below.

A detailed and standardized framework and writing format.

This document is intended to be used as a basis for national standardization organizations, manufacturers, or users when developing detailed specifications.

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 18015.3-2025 Digital Communication Cables - Twisted Pair or Star-Twisted Multi-Core Symmetrical Cables - Part 3: Work Area Cabling Cable Specifications Standard (IEC 61156-3:2008, MOD) Note. The content referenced in GB/T 18015.3-2025 has no technical differences from the content referenced in IEC 61156-3:2008.

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.

4 Develop detailed specifications and guidelines

The relevant specifications should maintain the transmission performance and characteristic impedance specified for all types of cables (Category 3 or Category 5).

Detailed specifications should be written according to the framework of the blank detailed specification; the framework is an integral part of this blank detailed specification.

The framework is shown in Table 1.

Note. If a feature is not applicable, fill in "Not applicable" in the corresponding blank.

When a performance requirement applies but the specific value is not required, the corresponding blank should be filled with "not specified".

When using "not specified", the appropriate requirements in the sub-specification should be adopted.

The letters in square brackets on this page and subsequent pages correspond to the following necessary information items. Please fill in the blanks with this information.

White area.

[1] The name and address of the organization that drafted the document.

[2] National standard number, version number and release date.