IEC 62420 : 1.0

CONCENTRIC LAY STRANDED OVERHEAD ELECTRICAL CONDUCTORS CONTAINING ONE OR MORE GAP(S)

International Electrotechnical Committee

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FOREWORD
1 Scope
2 Normative references
3 Terms and definitions
4 Designation system
5 Requirements for stranded conductors
  5.1 Material
  5.2 Conductor sizes
  5.3 Surface
  5.4 Stranding
      5.4.1 General
      5.4.2 Lay ratio for core wires
      5.4.3 Lay ratio for aluminium layer(s)
      5.4.4 Joints
      5.4.5 Linear mass
      5.4.6 Conductor strength
6 Tests
  6.1 Classification of tests
  6.2 Type Tests
      6.2.1 Length of sample required
      6.2.2 Joints in aluminium wires
      6.2.3 Annular gap(s)
      6.2.4 Stress-strain curves
      6.2.5 Breaking strength of conductor
      6.2.6 Creep curves
  6.3 Sample tests
      6.3.1 Cross-sectional area
      6.3.2 Overall diameter
      6.3.3 Linear mass
      6.3.4 Surface condition
      6.3.5 Lay ratio and direction of lay
      6.3.6 Breaking strength of wires after stranding (if
            requested)
      6.3.7 Wire canting on the outside layer (if requested)
7 Inspection
  7.1 Test location
  7.2 Acceptance or rejection
8 Packaging and marking
  8.1 Packaging
  8.2 Marking and tare
  8.3 Random lengths
Annex A (normative) Information to be supplied by purchaser
Annex B (normative) Stress-strain test method
Annex C (normative) Nominal mass of grease for stranded
        conductors
Annex D (informative) Alternate method of measuring the gap(s)
        within the conductor
Annex E (informative) Recommended conductor sizes and
        tables of conductor properties

Abstract

Describes the electrical and mechanical characteristics of concentric lay stranded overhead electrical conductors, containing one or more self-supporting aluminium or aluminium alloy layer(s).