BS 3242:1970

Co-operating organizations
Foreword
Specification
1 General
1.1 Scope
1.2 Definitions
1.3 Standards for aluminium alloy wire
2 Material
3 Dimensions and construction
3.1 Standard sizes of wire
3.2 Tolerances on the standard diameters of wires
3.3 Standard sizes of aluminium alloy stranded
     conductors
3.4 Joints in wires
3.5 Stranding
3.6 Completed conductor
4 Tests
4.1 Selection of test samples
4.2 Place of testing
4.3 Mechanical tests
4.4 Electrical resistivity test
4.5 Certificate of compliance
Appendices
A Notes on the calculation of Table 3
B Note on modulus of elasticity and coefficient of
     linear expansion
C Code names for standard aluminium alloy stranded
     conductors
D Lay ratios and stranding constants for non-standard
     constructions
Tables
1 Lay ratios for aluminium alloy stranded conductors
2 Aluminium alloy wires used in the construction of
     standard aluminium alloy stranded conductors
3 Standard aluminium alloy stranded conductors
4 Stranding constants

Requirements for heat-treated aluminium-magnesium-silicon alloy stranded conductors for overhead power transmission. Values for physical properties, sizes of wires and of stranded conductors. Tolerances on dimensions, mechanical properties and electrical resistivity. Modulus of elasticity and code names for use when ordering standard conductors are given.