BS 6500:1994

Committees responsible
Foreword
Specification
Section 1. General
1 Scope
2 References
2.1 Normative references
2.2 Informative references
3 Definitions
4 Voltage designation
5 Core identification
6 Marking
7 Construction and overall dimensions of cords in
     sections 2 and 3
8 Electrical requirements for cords in sections 2 and
     3
9 Mechanical strength requirements for cords in
     sections 2 and 3
10 Test under fire conditions
Section 2. Requirements for rubber-insulated flexible
            cords
11 Conductors
12 Insulation
13 Core identification
14 Fillers
15 Braid
16 Sheath
17 Screen
18 Marking
Section 3. Requirements for PVC-insulated flexible
            cords
19 Conductors
20 Insulation
21 Core identification
22 Fillers
23 Sheath
24 Screen
Section 4. Requirements for flexible cords insulated
            with varnished glass fibre: National type
25 Conductors
26 Insulation
27 Core identification
28 Indication of origin
29 Construction and overall dimensions
30 Electrical and mechanical test requirements for
     completed cords
Section 5. Requirements for PVC-insulated extensible
            leads
31 Type
32 Requirements prior to coiling
33 Coiling
34 Requirements after coiling
35 Mechanical test requirements for extensible leads
Appendices
A Guide to the use of insulated flexible cords
B Guidance on procedure for routine tests on rubber
     and PVC-insulated flexible cords of rated voltage
     Uo/U up to 450/750 V in sections 2 and 3
C Electrical tests
D Mechanical strength tests
E Solderability test for plain conductors
F Test methods for flexible cords insulated with
     varnished glass fibre: National type
G Procedure for checking the efficacy of the method
     of spark testing
H Test methods for PVC-insulated extensible leads
J Non-contamination test
K Test for resistance to heat of textile braids
Tables
1 Load and diameter of pulleys for flexing test
2 Current for flexing test
3 Rubber-insulated, braided flexible cord, 300/300 V
     twisted twin
4 Rubber-insulated, braided flexible cord, 300/300 V
     circular twin and 3-core
5 Rubber-insulated, braided, UDF cord, 300/300 V
     circular twin and 3-core
6 Rubber-insulated, sheathed, ordinary flexible cord,
     300/500 V circular twin, 3-core, 4-core and 5-core
7 Rubber-insulated, sheathed, screened, sheathed
     flexible cord, 300/500 V circular twin, 3-core and
     4-core
8 Rubber-insulated, sheathed flexible cord, 450/750 V
     single core, circular twin, 3-core, 4-core and
     5-core
9 Rubber-insulated, HOFR-sheathed flexible cord,
     300/500 V circular twin, 3-core, 4-core and 5-core
10 Rubber-insulated, braided, heat resistant cord,
     300/500 V single-core and twisted twin
11 Summary of the electrical tests on rubber-insulated
     cords in section 2
12 List of tests applicable to the flexible cords in
     section 2
13 PVC-insulated (tinsel conductors) flexible cord,
     300/300 V parallel twin
14 PVC-insulated (wire conductors) flexible cord,
     300/300 V parallel twin
15 PVC-insulated, PVC-sheathed light cord, 300/300 V
     parallel twin, circular twin, 3-core and 4-core
16 PVC-insulated, PVC-sheathed ordinary cord, 300/500
     V parallel twin, circular twin, 3-core, 4-core and
     5-core
17 PVC-insulated, sheathed, screened, sheathed light
     cord, 300/300 V circular twin and 3-core
18 PVC-insulated, sheathed, screened, sheathed
     ordinary cord, 300/500 V circular twin, 3-core and
     4-core
19 PVC-insulated, non-sheathed, cord, 300/500 V
     single-core and twisted twin
20 Summary of the electrical tests on PVC-insulated
     cords in section 3
21 List of tests applicable to the flexible cords in
     section 3
22 Glass fibre insulated flexible cord, 300/300 V
     single-core, twisted twin and twisted 3-core
23 Glass fibre insulated, braided flexible cord, 300/
     300 V circular twin and 3-core
24 Minimum internal diameter of extensible leads
25 Guide to the use of insulated flexible cords
26 Spark test voltage
27 Insulation test voltage
28 Insulation resistance constant (K value) at 20 deg
     C
29 Temperature correction factor
Figures
1 Typical 2-core extensible lead
2 Flexing apparatus
3 Bending test apparatus
4 Arrangement for wear resistance test
5 Spark test check: removal of insulation
6 Spark test check: covering with tape
7 Apparatus for test for resistance to heat of
     textile braids
List of references

Requirements and dimensions for cords and cables for operation up to 450 V to earth and 750 V between conductors.