IEC 62420:2008
Current
The latest, up-to-date edition.
Concentric lay stranded overhead electrical conductors containing one or more gap(s)
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English, English - French, Spanish, Castilian
25-04-2008
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
IEC 62420:2008 specifies the electrical and mechanical characteristics of concentric lay stranded overhead electrical conductors, containing one or more self-supporting alumimium or aluminium alloy layer(s) made of combination of any of the following metal wires:
- Hand drawn aluminium as per IEC 60889, designated A1;
- aluminium alloy type A or B as per IEC 60104, designated A2 or A3;
- thermal resistant aluminium alloy as per IEC 62004, designated AT1, AT2, AT3, or AT4;
- regular strength steel as per IEC 60888, designated S1A or S1B;
- high strength steel as per IEC 60888, designated S2A or S2B;
- extra-high strength steel as per IEC 60888, designated S3A;
- aluminium-clad steel as per IEC 61232, designated 20SA, 27SA, 30SA or 40SA.
Committee |
TC 7
|
DevelopmentNote |
A Bilingual edition has been published. (04/2009) Stability date: 2019. (09/2017)
|
DocumentType |
Standard
|
Pages |
27
|
PublisherName |
International Electrotechnical Committee
|
Status |
Current
|
Standards | Relationship |
NF EN 62420 : 2011 | Identical |
NEN EN IEC 62420 : 2008 | Identical |
I.S. EN 62420:2008 | Identical |
PN EN 62420 : 2008 | Identical |
SAC GB/T 30550 : 2014 | Identical |
VDE 0212-354 : 2009 | Identical |
DIN EN 62420 : 2009 | Identical |
BS EN 62420:2008 | Identical |
UNE-EN 62420:2009 | Identical |
CEI EN 62420 : 2009 | Identical |
EN 62420:2008 | Identical |
IEC 61395:1998 | Overhead electrical conductors - Creep test procedures for stranded conductors |
IEC 62004:2007 | Thermal-resistant aluminium alloy wire for overhead line conductor |
IEC 60888:1987 | Zinc-coated steel wires for stranded conductors |
IEC 60104:1987 | Aluminium-magnesium-silicon alloy wire for overhead line conductors |
IEC 60889:1987 | Hard-drawn aluminium wire for overhead line conductors |
IEC 61232:1993 | Aluminium-clad steel wires for electrical purposes |
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