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Aluminium Wire Ductility Test Guide

This document provides a method to test the ductility of aluminum wire used as conductors for electric cables. The wrapping test determines if the material is suitable for winding and twisting during cable manufacture and installation without breaking. The test involves wrapping a wire sample around its own diameter to form 6 turns, then unwrapping and re-wrapping the same 6 turns. If the wire does not break during this process, it passes the test. This ensures the material's suitability as a cable conductor by verifying its ability to withstand twisting without failure.

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99 views1 page

Aluminium Wire Ductility Test Guide

This document provides a method to test the ductility of aluminum wire used as conductors for electric cables. The wrapping test determines if the material is suitable for winding and twisting during cable manufacture and installation without breaking. The test involves wrapping a wire sample around its own diameter to form 6 turns, then unwrapping and re-wrapping the same 6 turns. If the wire does not break during this process, it passes the test. This ensures the material's suitability as a cable conductor by verifying its ability to withstand twisting without failure.

Uploaded by

Vatsal
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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UDC 621’315.55’669.

71 - 426 : 620-l 63’33 IS : 10810 ( Part 3 ) - 1984

Indian Standard 9=vir~


0
9

METHODS OF TEST FOR CABLES “RE-~kFiAn


1 I
m
PART 3 WRAPPING TEST-FOR ALUMINIUM WIRES

1. Scope-Covers a method to determine the ductility of aluminium wire used as conductors for
electric cables,
2. Significance -This test brings out the property of the material, which makes it suitable for
winding and twisting. Cable conductors during the process of manufacture as well as during
installation are subjected to torsion due to axial twist and might break, if material is not sufficiently
ductile. The properties checked by wrapping test ensure the suitability of material as cable
conductor.
3. Terminology
3.1 Break - For the purpose of this test, the word ‘ break ’ shall mean separation of wires.
4. Apparatus

4.1 NO specific apparatus is required.


4.2 A grip and revolving chuck may be used, if found convenient.
L
P
5. Material - No material other than test specimen is required for performing this test.
8 6. Test Specimen
6.1 Wire sample taken out from the lot.
6.2 Number of Specimens - One.
7. Conditioning - NO pre-conditioning is required.
6. Procedure
6.1 The wire used for conductor shall be wrapped round its own diameterto form a close helix of
6 turns; 6 turns shall then be unwrapped and again closely re-wrapped in the same direction as
before.

6.2 The wire is said to have passed the test, if the wire does not break.
9. Tabulation of Observations

Sample No. Diameter of Wire Whether Wire Breaks


mm or Not

10. Calculation - Not involved.


11. Report

11.1 Reference Specification

Sample No. Wire Breaks/Does not Break

11.2 Conclusion-Specimen meets/does not meet the requirements of specification.

Adopted 14 March 1964 @ April 1985, ISI Gr 1


I 1

INDIAN STANDARDS INSTlTDTlON


MANAK BHAvAN, 9 BAHADUR SHAH ZAFAR MARG
NEW DELHI 110002

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