IEC TR 62602 pdf download – Conductors of insulated cables – Data for AWG and KCMIL sizes
1 scope
IEC/TR 62602,which is a technical report, specifies the nominal cross-sectional areas, in therange 20 AWG to 2 000 kcmil (0,52 mm2 to 1 010 mm2), for conductors in electric powercables and cords for a wide range of types.Requirements for numbers and sizes of wires andresistance values are also included.These conductors include solid and stranded copper,aluminium and aluminium alloy conductors in cables for fixed installations and flexible copperconductors.
This technical report is not intended to apply to conductors designed for use in cablesintended for telecommunication or data transmission, winding wires or similar products.
Unless indicated to the contrary in a particular clause,this technical report relates toconductors in finished cables and not to conductors made or supplied for inclusion into acable.
The annexes give supplementary information covering measurement of resistance (Annex A),temperature correction factors for resistance measurement (Annex B) and dimensional limitsof circular conductors (Annex C).
2Terms and definitions
For the purposes of this document, the following definitions apply.
2.1
metal-coated
coated with a thin layer of suitable metal,such as tin or tin alloy
2.2
nominal cross-sectional area
value that identifies a particular size of conductor but is not subject to direct measurementNOTE Each particular size of conductor in this technical report is required to meet a maximum resistance value.
3classification
The conductors have been divided into four classes，1,2,5 and 6.Those in Classes 1 and 2are intended for use in cables for fixed installations. Classes 5 and 6 are intended for use inflexible cables and cords but may also be used for fixed installations;
-Class 1: solid conductors;
-Class 2: stranded conductors;- Class 5: flexible conductors;
– Class 6: flexible conductors which are more flexible than Class 5.
4 Materials
4.1 General
The conductors consist of one of the following:
• plain or metal-coated annealed copper;
• aluminium or aluminium alloy.
4.2 Solid aluminium conductors
Circular and shaped solid aluminium conductors are made from aluminium such that the tensile strength of the completed conductor is within the following limits:
NOTE The values given above are not applicable to aluminium alloy conductors.
4.3 Circular and shaped stranded aluminium conductors
Stranded aluminium conductors are made from aluminium such that the tensile strength of the individual wires is within the following limits:
NOTE 1 The values given above are not applicable to aluminium alloy conductors.
NOTE 2 This data can only be checked on wires taken before stranding and not on wires taken from a strandedconductor.
5 Solid conductors and stranded conductors
5.1solid conductors (Class 1)
5.1.1 Construction
a) Solid conductors(Class 1) consist of one of the materials specified in Clause 4.b) Solid copper conductors are of circular cross-section.
NOTE Solid copper conductors having nominal cross-sectional areas of 21 mm2 and above are for particulartypes of cable,e.g. mineral insulated, and not for general purposes.
c) Solid aluminium and solid aluminium alloy conductors of sizes 3,3 mm2 to 34 mm2 are of
circular cross-section.Larger sizes are of circular cross-section for single-core cables andmay be of either circular or shaped cross-section for multi-core cables.
5.1.2Resistance
The resistance of each conductor at 20 °C,when determined in accordance with Clause 7,does not exceed the appropriate maximum value given in Table 1.
NOTE For solid aluminium alloy conductors， having the same nominal cross-sectional area as an aluminiumconductor, the resistance value given in Table 1 shouid be multiplied by a factor of 1,162, unless otherwise agreedbetween the manufacturer and the purchaser.
5.2stranded circular non-compacted conductors (Class 2)5.2.1 construction
a) Stranded circular non-compacted conductors (Class 2) consist of one of the materialsspecified in Clause 4.
b) The wires in each conductor all have the same nominal diameter.
c)The number of wires in each conductor is not less than the appropriate minimum numbergiven in Table 2.
5.2.2 Resistance
The resistance of each conductor at 20°C, when determined in accordance with Clause 7,does not exceed the appropriate maximum value given in Table 2.
5.3Stranded compacted circular conductors and stranded shaped conductors
(Class 2)
5.3.1Construction
a) Stranded compacted circular conductors and stranded shaped conductors (Class 2)
consist of one of the materials specified in Clause 4.Stranded shaped copper, aluminiumor aluminium alloy conductors have a nominal cross-sectional area of not less than67 mm2.
b) The ratio of the diameters of two different wires in the same conductor does not exceed 2.c) The number of wires in each conductor is not less than the appropriate minimum numbergiven in Table 2.
NOTE This requirement applies to conductors made with wires of circular cross-section before compaction andnot to conductors made with pre-shaped wires.
IEC TR 62602 pdf download – Conductors of insulated cables – Data for AWG and KCMIL sizes
