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PVC cables are usually used for
Internal wiring of buildings and workshops
KV
11 kV
33 kV
Internal wiring of buildings and workshops
PVC (Polyvinyl Chloride) cables are primarily used for low-voltage residential and commercial building wiring because of their excellent insulating properties, flexibility, and cost-effectiveness. They are typically rated for voltages up to 1100V, making them unsuitable for high-voltage transmission lines (11kV or 33kV) which require specialized XLPE or paper-insulated oil-filled cables.
PVC (Polyvinyl Chloride) cables are primarily used for low-voltage residential and commercial building wiring because of their excellent insulating properties, flexibility, and cost-effectiveness. They are typically rated for voltages up to 1100V, making them unsuitable for high-voltage transmission lines (11kV or 33kV) which require specialized XLPE or paper-insulated oil-filled cables.
VmaxтАЛ=EbтАЛ├Чd тАФ Insulation breakdown limit where EbтАЛ is dielectric strength and d is thickness
RinsтАЛ=2╧АL╧БтАЛln(r1тАЛr2тАЛтАЛ) тАФ Insulation resistance formula
The principle relies on the dielectric strength of PVC material. When used as an insulation sheath around a copper or aluminum conductor, it prevents electrical leakage and provides mechanical protection against moisture, abrasion, and chemicals, suitable for indoor environments where ambient temperatures do not exceed the PVC thermal rating (typically 70┬░C).
PVC is categorized as a thermoplastic material.
Maximum continuous operating temperature for standard PVC is 70┬░C.
PVC cables are chemically inert and moisture resistant.
Not suitable for high voltage due to poor dielectric loss characteristics at high frequencies/voltages.
Low cost and easily available
High flame retardancy
Good mechanical flexibility
Resistant to chemicals and corrosion
Releases toxic HCl gas when burnt
Lower thermal limit compared to XLPE
Brittle at very low temperatures
Domestic wiring
Light industrial cabling
Control circuits
Flexible leads for appliances
PVC cables are standard for low voltage (LV) systems defined up to 1.1 kV.
Options B, C, and D refer to High Voltage (HV) levels (11kV, 33kV) which require XLPE or PILC (Paper Insulated Lead Covered) cables.
A is correct тАФ PVC cables are standard for low-voltage indoor wiring due to their cost-effectiveness and good insulating properties.
Remember: PVC is for LV (Low Voltage), while XLPE is preferred for MV and HV (Medium/High Voltage) systems due to its superior thermal and dielectric properties.