Amendment 1 Round wire concentric lay overhead electrical stranded conductors
|Publication Date:||1 May 1997|
|ICS Code (Power transmission and distribution lines):||29.240.20|
This International Standard specifies the electrical and mechanical characteristics of round wire concentric lay overhead electrical stranded conductors made of combinations of any of the following metal wires:
a) hard-drawn aluminium as per IEC 889 designated A1*;
b) aluminium alloy type B as per IEC 104 designated A2*;
c) aluminium alloy type A as per IEC 104 designated A3* (and when applicable to the following cores, as per IEC 888);
d) regular strength steel, designated S1A or S1B, where A and B are zinc coating classes, corresponding respectively to classes 1 and 2;
e) high strength steel, designated S2A or S2B;
f) extra high strength steel, designated S3A.
The conductor designations included in this standard are:
A1, A2, A3,
A1/S1A, A1/S1B, A1/S2A, A1/S2B, A1/S3A, A2/S1A,
A2/S1B, A2/S3A, A3/S1A,
A3/S1B, A3/S3A, A1/A2, A1/A3.
* The resistivity of these metals is as follows (in increasing order):
A1: 28,264 nΩm (corresponding to 61% IACS),
A2: 32,530 nΩm (corresponding to 53% IACS),
A3: 32,840 nΩm (corresponding to 52,5% IACS).