Revised Standard from Last Update.

1. Scope

The standard covers the requirements of flexible cables of the following voltage grades for use in coal mines, quarries and other miscellaneous mines:

1.1, 3.3, 3.8/6.6 and 6.35/11 kV

NOTES

1 1.1 kV and 3.3 kV voltage grade cables are suitable for both earthed and unearthed system.

2 3.8/6.6 kV voltage grade cables are suitable for 6.6 kV earthed system.

3 6.35/11 kV voltage grade cables are suitable for 11 kV earthed system and 6.6 kV unearthed system (6.6/6.6 kV).

4 The cables conforming to this standard may be operated at a power frequency voltage 10 percent higher than the cable rated voltage.

These cables are suitable for use where the combination of ambient temperature and temperature-rise due to load results in conductor temperature not exceeding 90°C under normal operation and 250°C under short circuit conditions.

2. References

The standards listed in Annex A contain provisions which, through reference in this text, constitute provisions of this standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards listed in Annex A.