IS 7098 : Part 1 : 2025 Crosslinked Polyethylene Insulated Thermoplastic Sheathed Cables - Specification - Part 1 For Working Voltages up to and including 1 100 Volts
1 SCOPE
1.1 This standard (Part 1) covers the requirements for both armored and unarmoured single, twin, three, four and multi core cross-linked polyethylene (XLPE) insulated and thermoplastic sheathed cables for electric supply and control purposes.
1.2 The cables covered under this standard are suitable for use on a.c. single phase or three phase (earthed or unearthed) systems for rated voltages up to and including 1 100 V. Theses cables may be used on dc systems for rated voltages up to and including 1 500 V.
NOTE - The cables conforming to this standard may be operated continuously at a power frequency voltage 10 percent higher than rated voltage.
1.3 Armoured cables specified in this standard are suitable for use in mines also. However, for such cables, additional requirements have been included wherever necessary (4.2, 14.5.2 and 18.2).
1.4 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 condition.
1.5 This standard also covers cables with improved fire performance, categories C1, C2 and C3, as given in Annex A. For such cables additional requirements have been included wherever necessary (8.2, 8.4, 16.1, 16.2 and 18.2.1).
NOTE - Cables with PVC outer sheath in this standard can be classified as meeting the requirement of Category 01.
2 REFERENCES
The standards listed in Annex B 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 edition of these standards.