This standard specifies the requirements and testing methods for single and multi-core cross-linked polyethylene (XLPE) insulated and PVC sheathed cables with copper or aluminium conductors. It covers cables for working voltages up to and including 1100V, suitable for fixed electrical installations.
Specifies requirements for low voltage XLPE insulated, PVC sheathed cables with copper or aluminium conductors for applications up to 1100 V.
Quick Reference Values
Voltage RatingUp to and including 1100 Volts
Max Conductor Operating Temperature90 °C
Max Conductor Short Circuit Temperature250 °C
High Voltage Test (AC)3.0 kV for 5 minutes
High Voltage Test (DC)9.0 kV for 5 minutes
Minimum Insulation Resistance at 20°C200 megaohm-km
Key Formulas
R = R_t * [1 + α(t-20)] — Conductor resistance correction for temperature, where R_t is resistance at t°C and α is the temp. coefficient
Practical Notes
The key advantage of these cables over PVC insulated cables (IS 1554) is the higher conductor operating temperature (90°C vs 70°C), allowing for higher current carrying capacity.
For new projects, IS 7098 (Part 1) is often preferred as it is a more modern and comprehensive standard for XLPE insulated cables up to 3.3 kV.
Ensure correct identification of cores as per Clause 12, especially for multi-core cables, to prevent incorrect phase connections.