Stock Code: 874632
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    What are the differences among RHW, RHW-2, USE-2, and RHH Building Wire?
    FAQs

    What are the differences among RHW, RHW-2, USE-2, and RHH Building Wire?

    RHW, RHW-2, USE-2, and RHH are all types of building wires that are used in different applications, and they vary based on their insulation, temperature ratings, and specific usage. Here’s a detailed explanation of each type:
    ●RHW (XLPE or Rubber-Insulated Heat- and Water-Resistant Wire): This wire is designed for both dry and wet environments. It is rated for 75°C in wet locations and 90°C in dry locations. The insulation is typically made of cross-linked polyethylene (XLPE) or ethylene propylene rubber (EPR), making it highly resistant to moisture and chemicals. RHW is commonly used in conduit, raceways, and underground installations.
    ● RHW-2: This is an upgraded version of RHW with enhanced heat resistance. RHW-2 is rated for 90°C in both wet and dry environments, providing greater versatility and safety in higher temperature applications. The insulation materials are similar to RHW but are designed to withstand higher temperatures.
    ● USE-2 (Underground Service Entrance Cable): USE-2 is specifically designed for underground service entrance applications and is rated for 90°C in wet environments. It is commonly used for direct burial in the ground, where it is exposed to moisture and soil chemicals. The insulation is typically made of cross-linked polyethylene (XLPE), which offers excellent water and chemical resistance. However, USE-2 is not permitted for interior building wiring unless it is part of a service-entrance cable.
    ● RHH (Rubber-Insulated Heat-Resistant Wire): RHH is designed for dry locations and is rated for 90°C. It is used in areas where heat resistance is essential, such as industrial settings or high-temperature environments. The insulation is usually similar to RHW, but RHH is not rated for wet conditions, making it unsuitable for applications where moisture may be present.

    Key Differences:

    ●Temperature Ratings: RHW and RHW-2 are suitable for both wet and dry locations, with RHW-2 offering higher temperature resistance. RHH is designed for dry conditions only, while USE-2 is optimized for wet environments, particularly underground.
    ● Application: RHW and RHW-2 can be used in a variety of installations, including conduit and underground, while RHH is limited to dry areas. USE-2 is specifically intended for underground service entrances.
    ● Moisture Resistance: RHW, RHW-2, and USE-2 all offer moisture resistance, with USE-2 being particularly suited for direct burial, while RHH is not moisture-resistant.
    Choosing the right wire depends on the specific environmental conditions and installation requirements of your project.