IS 7098 (Part 2) : 2011
Cables - Crosslinked polyethylene insulated Thermoplastics sheathed cables – Specification Part 2 for working voltages from 3.3 kV up to and including 33 kV
summary
Crosslinked polyethylene (XLPE) insulated thermoplastics sheathed cables are power cables designed for working voltages from 3.3 kV up to and including 33 kV. XLPE insulation provides excellent electrical strength, thermal resistance, and durability, making these cables suitable for power transmission and distribution in industrial, commercial, and utility networks.
Why BIS Certificate is Mandatory for Crosslinked polyethylene insulated Thermoplastics sheathed cables – Specification Part 2 for working voltages from 3.3 kV up to and including 33 kV
BIS certification is mandatory to ensure these medium-voltage power cables meet strict safety, performance, and reliability requirements. As they operate at high voltages, non-standard cables may cause insulation failure, fire hazards, or power losses. BIS standards ensure electrical safety, insulation quality, and long-term operational reliability in India.
What is BIS Certified for Crosslinked polyethylene insulated Thermoplastics sheathed cables – Specification Part 2 for working voltages from 3.3 kV up to and including 33 kV
The BIS certified specification defines requirements for conductor construction, XLPE insulation, thermoplastic sheath, voltage grade, electrical and mechanical properties, routine and type tests, and marking. It ensures cables comply with Indian Standards for medium-voltage applications, guaranteeing safe power transmission under specified operating conditions.
Test required for Crosslinked polyethylene insulated Thermoplastics sheathed cables – Specification Part 2 for working voltages from 3.3 kV up to and including 33 kV
| Title | Mandatory/Optional |
|---|---|
| Annealing test (for Cu) | Optional |
| Tensile test (for Al) (not applicable for compacted or shaped conductor) | Optional |
| Wrapping test (for Al) | Optional |
| Resistance test | Optional |
| Purity test (for Cu) | Optional |
| Test for armouring wires/ formed wires | Optional |
| Resistance test for armour (for mining cables) | Required |
| Materials | Required |
| Construction of conductor | Required |
| Conductor screening | Required |
| Application of insulation | Required |
| Insulation screening | Required |
| Core identification | Required |
| Laying up of cores | Required |
| Inner sheath | Required |
| Armouring | Required |
| Outer sheath | Optional |
Physical tests for insulation
| Title | Mandatory/Optional |
|---|---|
| Tensile Strength and elongation at break | Optional |
| Ageing in Air oven | Optional |
| Hot set test | Optional |
| Shrinkage test | Required |
| Water absorption (gravimetric) | Optional |
| Thickness of insulation & sheath, eccentricity of insulation | Optional |
Test on extruded semi-conducting screens
| Title | Mandatory/Optional |
|---|---|
| Test for strippability of semiconducting strippable insulation screen (wherever applicable) | Optional |
| Volume resistivity | Optional |
Physical test for outer sheath
| Title | Mandatory/Optional |
|---|---|
| Tensile strength and elongation at break | Optional |
| Ageing in air oven | Optional |
| Shrinkage test | Optional |
| Hot deformation | Required |
| Loss of mass in air oven | Optional |
| Heat shock | Optional |
| Thermal stability | Optional |
| Carbon black content of polythene sheath (applicable for Black PE sheath only) | Required |
| Thermal ageing test for complete cable | Optional |
| Partial discharge test (for screened cables) | Optional |
| High voltage test | Optional |
Benefits of BIS Certification for Crosslinked polyethylene insulated Thermoplastics sheathed cables – Specification Part 2 for working voltages from 3.3 kV up to and including 33 kV
1. Electrical Safety Assurance
BIS certification ensures cables meet prescribed insulation and voltage withstand requirements, reducing risks of short circuits, breakdowns, and electrical accidents.
2. High Performance and Reliability
Certified cables offer consistent electrical performance, thermal stability, and resistance to environmental stress during long-term service.
3. Quality and Durability
BIS standards ensure uniform manufacturing, strong insulation integrity, and mechanical strength, minimizing failures and maintenance costs.
4. Legal Compliance in India
BIS certification is mandatory, allowing manufacturers and importers to sell cables legally and avoid penalties or rejection in infrastructure projects.
5. Trust and Market Acceptance
BIS-marked cables are widely accepted by utilities, EPC contractors, and government bodies, enhancing brand credibility and market competitiveness.