BS 4087:1989
Current
The latest, up-to-date edition.
Specification for copper-covered steel wire for telephone and telegraph purposes
Hardcopy , PDF
English
31-08-1989
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Foreword
Committees responsible
Specification
1. Scope
2. Definitions
3. Manufacture
4. Quality of finished wire
5. Tolerances
6. Inspection and testing
7. Selection of test pieces and number of tests
8. Mechanical properties
9. Electrical properties
10. Continuity of coating
11. Retests
12. Packing and marking
Appendices
A. Information to be supplied by the purchaser
B. Factors for the conversion of electrical resistance
to 20 deg C
Tables
1. Tolerances on diameter
2. Properties of copper-covered steel wire for
telephone and telegraph purposes
3. Factors for the conversion of electrical resistance
to 20 deg C
Mechanical and electrical properties of copper-covered steel wire with two grades of conductivity and three of tensile strength together with size tolerances for a range of wire sizes. Metric units.
| Committee |
ISE/106
|
| DevelopmentNote |
Supersedes 88/35114 DC and BS 4087(1966) (07/2005) Reviewed and confirmed by BSI, January 2011. (12/2010)
|
| DocumentType |
Standard
|
| Pages |
10
|
| PublisherName |
British Standards Institution
|
| Status |
Current
|
| Supersedes |
This British Standard specifies the electrical and mechanical properties of cold drawn copper-covered steel wire for telephone and telegraph purposes, with two grades of conductivity and three of tensile strength (expressed as minimum breaking load) for a range of wire diameters from 0.51 mm to 4.88 mm together with diameter tolerances for a range of nominal wire diameters.
NOTE 1. The information to be supplied by the purchaser in the enquiry and order is given in appendix A.
NOTE 2. The titles of the publications referred to in this standard are listed on page 5.
| BS 5714:1979 | Method of measurement of resistivity of metallic materials |
| BS 4545:1970 | Methods for mechanical testing of steel wire |
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