1 Scope
This standard specifies technical requirements, test items and methods, transportation and storage of rigid ladders of insulating material for live working.
This standard is applicable to rigid ladders of insulating material used for live working on electrical installations at 10kV to 500 kV.
2 Normative References
The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies.
GB 7059 Safety Requirements for Portable Wood Ladders
GB 13398 Insulating Hollow Tubes and Foam-filled Tubes and Solid Rods for Live Working (GB 13398-2008, IEC 60855:1985, MOD; IEC 61235:1993, MOD)
GB/T 14286 Live Working — Terminology for Tools Equipment and Devices (GB/T 14286-2008, IEC 60743:2001, MOD)
DL/T 878 Test Guide of the Insulating Tool for Live Working
3 Terms and Definitions
Foreword II
1 Scope
2 Normative References
3 Terms and Definitions
4 Classification
5 Technical Requirements
6 Type Tests
7 Routine Tests
8 Preventive Test
9 Packaging, Transportation and Storage
Appendix A (Normative) Schematic Diagram of Rigid Ladders of Insulating Material
Appendix B (Normative) Schematic Diagram for Test Device of Rigid Ladders of Insulating Material
Appendix C (Normative) Test Sequence and Test Items of Rigid Ladders of Insulating Material
