GB/T 31887.3-2025Cycles - Lighting and retro-reflective devices - Part 3: Installation and use of lighting and retro-reflective devices (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 31887 "Bicycle lighting and retroreflective devices". GB/T 31887 has been published as follows.

Part 2.

---Part 1: Illumination and Light Signaling Devices;

---Part 2: Reflection Device;

---Part 3: Installation and Use of Lighting and Retroreflective Devices;

---Part 4: Lighting systems powered by bicycle generators;

---Part 5: Lighting systems for bicycles that are not powered by generators.

This document replaces GB/T 31887.3-2019 "Bicycle lighting and retroreflective devices - Part 3: Lighting and retroreflective devices" the installation and use of the device, compared with GB/T 31887.3-2019, has the following main technical changes, except for structural adjustments and editorial modifications.

a) The accuracy of the measuring device has been changed (see 4.1, 2019 edition of 4.1);

b) The manufacturer's instruction manual has been amended (see Chapter 7, Chapter 7 of the 2019 edition).

This document is equivalent to ISO 6742-3:2023 "Bicycle lighting and retroreflective devices - Part 3: Lighting and retroreflective devices" Installation and use of the device.

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 National Light Industry Council.

This document is under the jurisdiction of the National Bicycle Standardization Technical Committee (SAC/TC155).

Introduction

GB/T 31887 "Bicycle Lighting and Retroreflective Devices" was drafted based on the safety requirements of bicycles at night, and its purpose is to ensure...

This document ensures the safety of bicycle lighting and retroreflective devices manufactured in accordance with this document during nighttime riding. GB/T 31887 is proposed to be submitted to 5 departments.

Composition.

---Part 1: Lighting and Light Signaling Devices. The purpose is to specify the optical performance requirements for bicycle lighting and light signaling devices.

To ensure standardized product quality and consumer safety while riding at night.

---Part 2: Retroreflective Device. The purpose is to specify the optical performance requirements for bicycle retroreflective devices, facilitating product quality control.

Standardize quantities and ensure consumer safety while riding at night.

---Part 3: Installation and Use of Lighting and Retroreflectors. The purpose is to provide information on the installation and use of bicycle lighting and retroreflectors.

Standardized installation requirements facilitate product installation and use, ensuring optimal light performance of lighting and retroreflective devices and guaranteeing consumer safety.

Safety for riders at night.

---Part 4: Lighting Systems Powered by Bicycle Generators. The purpose is to assess the performance of lighting devices powered by bicycle generators.

These requirements facilitate standardized product quality and ensure consumer safety while cycling at night.

---Part 5: Lighting Systems for Bicycles Without Generators. The purpose is to provide lighting systems for bicycles without generators.

Performance requirements are set to facilitate standardized product quality and ensure consumer safety during nighttime riding.

GB/T 31887 (all parts) is a recommended national standard. GB/T 31887.3 contains product installation and usage requirements, and is consistent with GB/T 31887.1.

The product optical performance standards GB/T 31887.2, GB/T 31887.4, and GB/T 31887.5 are somewhat related. These five recommended national standards...

The aim is to ensure high-quality optical performance and reliability from start to finish for all types of lighting and retroreflective devices, requiring this from the product design stage.

Security issues were first considered.

The scope of GB/T 31887 (all parts) is limited to safety considerations regarding the optical performance of the product. If the bicycle is used on public roads, then...

You must abide by the National Road Traffic Safety Law and related management regulations.

Bicycle safety and quality are crucial to consumers' traffic safety and lives. Since.1995, my country has successively released three versions of bicycle lighting standards.

The equipment and three versions of bicycle reflector device standards provide a basis for the upgrading and improvement of bicycle lighting and reflector products in my country, and enhance the optical performance of these products.

This provides technical support for the upgrade. GB/T 22791-2008 is equivalent to ISO 6742-1:1987 "Optical and physical aspects of bicycle lighting and reflecting devices".

The requirements for lighting fixtures, Part 1: Lighting equipment, GB/T 31887-2015, are equivalent to ISO 6742-2:1985 "Lighting and reflectors for bicycles".

ISO 6742, revised and published in 2015, consists of two parts. Optical and physical requirements, Part 2: Retroreflective apparatus.

It is divided into 5 parts. Therefore, GB/T 22791 is incorporated into GB/T 31887, revising and expanding it from 2 parts to 5 parts. The standard level is aligned with national standards.

In line with international standards, we will continue to provide technical support for the safety of bicycle products in my country.

Bicycle lighting and retroreflective devices Part 3: Illumination and Retroreflection Devices Installation and Use

1 Scope

This document specifies the safety requirements for mounting devices, control mechanisms, maintenance guidelines, installation, and usage instructions for lighting and retroreflective devices.

The requirements describe the corresponding experimental methods.

This document applies to bicycles used on public roads, particularly two-wheeled bicycles conforming to ISO 4210 and ISO 8098.

Illumination and reflective devices.

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.

ISO 6742-1 Bicycle lighting and retroreflective apparatus – Part 1: Lighting and light signaling apparatus Note. GB/T 31887.1-2025 Bicycle lighting and retroreflective apparatus – Part 1: Lighting and light signaling apparatus (ISO 6742-1:2023) MOD) Note. GB/T 2423.10-2019 Environmental testing - Part 2: Test methods - Test Fc. Vibration (sine) (IEC 60068-2-6:2007, IDT)

3 Terms and Definitions

The terms and definitions defined in ISO 6742-1, as well as the following terms and definitions, apply to this document.

control device

A device that changes the state or function of a lighting device, operated directly or indirectly by the rider.

4 General Rules