What is BS 6708 - Flexible cables for use at mines and quarries about?
BS 6708 specifies requirements and dimensions for flexible cables used in mining and quarrying.
Specific types of cable covered in BS 6708 are as follows:
Non-armoured cables having individually metallic screened cores and a rated voltage of 640/1100 V, for use:
- With coalface cutters and other similar machines: types 7, 7M, 7S, 11, 14 and 16
- In overhead catenary systems and similar applications: types FS4 (flat form cable)
Cables with galvanized steel pliable wire armouring, with:
- Unscreened cores and a rated voltage 640/1100 V: types 20 and 21 or
- Individually metallic screened or unscreened cores and a rated voltage 640/1100 V used primarily for remote control circuits and coalface lighting: types 62, 63, 64, 70 and 71; or
- Individually metallic screened cores and a rated voltage 640/1100 V: types 201 and 211; or
- A rated voltage 1900/3300 V used as trailing cables in quarries or for mine roadway cable extension purpose: types 321 and 331
Auxiliary cables with galvanized steel pliable wire armouring having up to 24 individually metallic screened cores and a rated voltage 320/550 V, primarily for use on large mining in machines where the interconnection between machine sections or a machine section and auxiequipment is required: types 506, 512, 518, and 524. 524.
Cables with galvanized steel pliable wire armouring having individually metallic screened or unscreened cores and a rated voltage 3800/6600 V, used as trailing cables in quarries and rated for roadway extension purposes: types 621, 630 and 631.
Non-armoured cable having individually metallic screened cores and a rated voltage 600/1000 V, primarily for use with hand-held drilling machines in mines: type 44.
Non-armoured cable having individually non-metallic screened cores and a rated voltage 600/1000 V, primarily for use with hand-held drilling machines in mines: type 43.
Non-armoured cable having individually metallic screened cores and a rated voltage 3800/6600 V, primarily for use as trailing cables for large machines at quarries: type 730.
Non-armoured cable having individually metallic screened cores and a rated voltage 6350/11000 V, primarily for use as trailing cables for large machines at quarries: type 830.
Non-armoured cables having individually metallic screened cores and rated voltage 1900/3300 V, for use with coalface cutters and other similar machines: types 307, 307M and 307S.
Note 1: Information on approved codes of practice and conductivities related to the cables in this standard is given in annex A.
Note 2: Recommended current ratings are given in annex B.
Note 3: Short circuit current carrying capability of flexible cable screens is given in annex C.
Who is BS 6708 - Flexible cables for use at mines and quarries for?
BS 6708 on flexible cables for use at mines and quarries is useful for:
- Mining and quarrying industry
- Manufacturers and suppliers of flexible cables
- Quality control departments
- Teams involved in construction, marking and rating of flexible cables
Why should you use BS 6708 - Flexible cables for use at mines and quarries?
BS 6708 provides information on constructional details and dimensions of various types of cables used at mines and quarries.
Also gives guidance on the identification of core, various tests on core and marking, along with sequence of colors for core, insulation, and short circuit current ratings. Voltage test, insulation test and wrapping tests are specified for different types of cables in BS 6708.
Overall, BS 6708 helps you understand all essential requirements about the dimensions of the cables to ensure their construction in a standardized manner and to ensure appropriate insulation and conductivity through cables.
What’s changed since the last update?
BS 6708 supersedes BS 6708: 1991. BS 6708 includes some technical changes with respect to BS 6708: 1991. These include:
- Updated insulation specifications and short circuit current ratings
- Includes a new section covering cable types 307, 307M, and 307S for rated voltages of 1900/3300 V and having individual metallic screens
