BS 6708:1991

Committees responsible
Foreword
Specification
Section 1. General
1 Scope
2 Definitions
3 Abbreviations
4 Voltage designation
Section 2. Cables with individual metallic screens,
            rated voltage 640/1100 V, for use with coal-
            cutters and for similar purposes (types 7,
            7M, 7S, 11, 14 and 16) and flat cables for
            use on overhead catenary systems and for
            similar purposes (type FS4)
5 Types of cable
6 Conductors
7 Insulation
8 Thickness of insulation
9 Core tape
10 Core identification
11 Protective screen
12 Central filler
13 Laying-up of cores
14 Sheath of pilot unit and outer sheath
15 Marking
16 Tests on cores
17 Tests on completed cable
Section 3. Cables with galvanized steel pliable wire
            armouring, rated voltages up to 1900/3300 V
            (types 20, 21, 62, 63, 64, 70, 71, 201, 211,
            321 and 331)
18 Types of cable
19 Conductors
20 Insulation
21 Thickness of insulation
22 Core tape
23 Core identification
24 Protective screen
25 Central filler or cradle separator
26 Laying-up of cores
27 Sheath under armour
28 Armour
29 Outer sheath
30 Marking
31 Tests on cores
32 Tests on completed cable
Section 4. Cables with galvanized steel pliable wire
            armouring having up to 24 individual
            screened cores rated voltage 320/550 V
            (types 506, 512, 518 and 524)
33 Types of cable
34 Construction
35 Conductors
36 Insulation
37 Thickness of insulation
38 Core identification
39 Protective screen
40 Central filler
41 Laying-up of cores
42 Sheath under armour
43 Armour
44 Outer sheath
45 Marking
46 Tests on cores
47 Tests on completed cable
Section 5. Cables with galvanized steel pliable wire
            armouring having individual metallic
            screened or unscreened cores rated voltage
            3800/6600 V (types 621, 630 and 631)
48 Types of cable
49 Conductors
50 Insulation
51 Thickness of insulation
52 Core tape
53 Core identification
54 Protective screen
55 Central filler
56 Laying-up of cores
57 Sheath under armour
58 Armour
59 Outer sheath
60 Marking
61 Tests on cores
62 Tests on comleted cable
Section 6. Cables with individual metallic screens,
            rated voltage 600/1000 V, for use with
            drills (type 44)
63 Types of cable
64 Conductors
65 Insulation
66 Thickness of insulation
67 Core tape
68 Core identification
69 Protective screen
70 Laying-up of cores
71 Outer sheath
72 Marking
73 Tests on cores
74 Tests on completed cable
Section 7. Cables with individual non-metallic screens,
            rated voltage 600/1000 V, for use with
            drills (type 43)
75 Type of cable
76 Conductors
77 Insulation
78 Conducting elastomeric screen
79 Thickness of insulation and covering
80 Core identification
81 Cradle separator
82 Laying-up of cores
83 Screen over laid-up cores
84 Outer sheath
85 Marking
86 Tests on cores
87 Tests on completed cable
88 Electrical test on conducting elastomeric screen
Section 8. Cable with individual metallic screened
            cores, non-armoured, rated voltage 3800/6600
            V (type 730)
89 Type of cable
90 Conductors
91 Insulation
92 Thickness of insulation
93 Core tape
94 Core identification
95 Protective screen
96 Central filler
97 Laying-up of cores
98 Outer sheath
99 Marking
100 Tests on cores
101 Test on completed cable
Section 9. Cable with metallic screened cores, non-
            armoured, rated voltage 6350/11 000 V (type
            830)
102 Type of cable
103 Conductors
104 Insulation
105 Thickness of insulation
106 Core tape
107 Core identification
108 Protective screen
109 Central filler
110 Laying-up of cores
111 Outer sheath
112 Marking
113 Tests on cores
114 Tests on completed cable
Appendices
A Recommended current ratings
B Short circuit current-carrying capability of
     flexible cable screens
C Measurement of insulation and sheath thickness
D Protective screens: form, method of application and
     material
E Voltage and insulation resistance tests
F Tests for galvanized steel wire taken from
     completed cables
G Electrical test for conducting elastomeric screen
     for type 43 cable
NUMEROUS TABLES
Figures
1 Core identification: type 506 cable
2 Core identification: type 512 cable
3 Core identification: type 518 cable
4 Core identification: type 524 cable
5 Positions for first measurement of insulation
     thickness
6 Positions of point of intersection of cross-wires
     of the measuring microscope
7 Position for measurement of sheath thickness
8 Position for measurement of sheath thickness for
     type FS4 cable
9 Positions of point of intersection of cross-wires
     of the measuring microscope

Specifies flexible cable types, their electrical characteristics, construction, identification and testing.