Which type of wire must be used in damp locations?

In damp locations, the appropriate type of wire to use is NMW (Non-Metallic Wire for Wet Locations). NMW is designed specifically to withstand moisture and dampness, which makes it suitable for environments where exposure to water or high humidity is a concern. This wire type has insulation and a jacket that are resistant to moisture, ensuring safety and performance in challenging conditions.

Using NMW in damp locations helps prevent issues such as short circuits, corrosion, and degradation of the wire insulation, which can lead to safety hazards. It's crucial to choose wiring that meets the specific requirements of the installation environment, particularly when dealing with moisture, to ensure the longevity and reliability of the electrical system.

Other types of wire like NMD (Non-Metallic Sheathed Cable), LVT (Low Voltage Thermoplastic), and BX (Flexible Metal Conduit) may not provide adequate moisture resistance, making them unsuitable for damp areas where water exposure is a risk.