TITLE: Flexible cables for use at mines and quarries

SCOPE: BS 6708 specifies flexible cable types, their electrical characteristics, construction, identification and testing.

BS 6708 provides information on constructional details and dimensions of various types of cables used at mines and quarries. 

Specific types of cable covered in BS 6708 standard 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 auxiliary equipment 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 of 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.  

Also given is guidance on the identification of cores, various tests on cores and marking, along with sequence of colors for cores, insulation, and short circuit current ratings. Voltage test, insulation test and wrapping tests are specified for the different types of cables included in BS 6708. 

PRODUCT FAMILY: MINING AND TUNNELLING

Please contact Tratos for details of the ranges of cables Tratos manufacture in accordance with this standard.