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PVC/XLPE insulated cables
PVC/XLPE insulated cables
PVC (Polyvinyl Chloride) and XLPE (Cross-Linked Polyethylene) are two common types of insulation used in power cables. They differ in performance, durability, and application, so the choice depends on the environmental and electrical requirements.
PVC Insulated Cables
- Description:
- PVC is a thermoplastic material widely used for both insulation and sheathing of low-voltage cables.
- Key Features:
- Max operating temperature: ~70°C (continuous)
- Low cost, easy to handle
- Flame retardant and good resistance to chemicals
- Less durable in high-temperature or UV-exposed environments
- Applications:
- Domestic wiring
- Building services
- Control and signal cables
XLPE Insulated Cables
- Description:
- XLPE is a cross-linked form of polyethylene that offers superior thermal and electrical properties.
- Key Features:
- Max operating temperature: 90°C (continuous), 250°C (short-circuit)
- Excellent dielectric strength
- High resistance to heat, chemicals, and moisture
- Stiffer than PVC, but more durable and long-lasting
- Applications:
- Power transmission and distribution (LV/MV/HV)
- Underground installations
- Industrial and outdoor environments
PVC vs XLPE – Quick Comparison:
| Feature | PVC | XLPE |
|---|---|---|
|
Thermal Limit (Continuous) |
70°C |
90°C |
|
Short-Circuit Temp |
160°C |
250°C |
|
Dielectric Strength |
Good |
Excellent |
|
Chemical/UV Resistance |
Moderate |
High |
|
Flexibility |
More flexible |
Less flexible |
|
Cost |
Lower |
Higher |
|
Typical Use Voltage |
LV (≤1.1kV) |
LV/MV/HV (0.6kV – 132kV+) |