IEC 61478 : 1.1

LIVE WORKING - LADDERS OF INSULATING MATERIAL

International Electrotechnical Committee

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FOREWORD
1 Scope
2 Normative references
3 Definitions
4 Classification
   4.1 Category
   4.2 Category
5 Requirements
   5.1 General physical requirements
   5.2 Category 1 physical requirements
        5.2.1 Base section
        5.2.2 Ladder extensions
        5.2.3 Stiles
        5.2.4 Fixing systems
        5.2.5 Connecting device
        5.2.6 Cradles
   5.3 Category 2 physical requirements
        5.3.1 Base section
        5.3.2 Ladder extensions
        5.3.3 Stiles
        5.3.4 Connecting device
   5.4 Mechanical requirements
        5.4.1 General mechanical requirements
        5.4.2 Category 1 mechanical requirements
        5.4.3 Category 2 mechanical requirements
   5.5 General electrical requirements
        5.5.1 Conductive parts
        5.5.2 Insulating parts
   5.6 Marking
6 Type tests
   6.1 General
   6.2 Visual, dimensional and functional inspection
   6.3 Durability of markings
   6.4 Mechanical tests
        6.4.1 General
        6.4.2 Category 1 ladders
        6.4.3 Category 2 ladders
   6.5 Electrical tests
        6.5.1 Electrical test on mechanically aged ladder
        6.5.2 Electrical test on Category 2 individual sections
7 Routine tests
   7.1 General
   7.2 Visual inspection
   7.3 Operational inspection
   7.4 Electrical test
8 Quality plan and acceptance tests
   8.1 General
   8.2 Records
9 Modifications
Annex A (normative) Chronology of tests
Annex B (normative) Acceptance tests
Annex C (normative) Sampling procedure
Annex D (informative) Recommendations for in-service care
Figures
Tables

Abstract

Applies to fully insulating spliced or hook ladders with extension or having a combination of insulating and conductive sections and used for live working on a.c. or d.c. electrical installations at 1000 V and above for a.c. and 1500 V and above for d.c. The ladders are classified functionally as Category 1 and Category 2.