RHW is a rubber-insulated building wire rated 75 degrees C with heat and moisture-resistant insulation and a moisture-resistant, flame-retardant nonmetallic cover, used in wet locations.
RHW is a building wire with rubber-based insulation rated for operation at 75 degrees C, featuring heat and moisture-resistant insulation and an outer covering that is moisture-resistant, flame-retardant, and nonmetallic. The R indicates rubber insulation and the W indicates suitability for wet locations. This construction makes RHW generally used in wet environments where moisture resistance is required.
The moisture-resistant insulation and covering allow RHW to perform reliably where dampness is present, protecting the conductor and maintaining insulation integrity. Building wire types like RHW are defined by their insulation, temperature rating, covering, and suitable locations.
In commercial and industrial buildings, wires such as RHW carry power in wet environments within their rating. Selecting wire with the correct insulation, temperature rating, and location suitability is part of applying it correctly.
Because the moisture-resistant insulation and covering let RHW perform reliably where dampness is present, protecting the conductor and maintaining insulation integrity, the wire is defined by its insulation, temperature rating, covering, and suitability for wet locations.
At Windy City Wire, an understanding of building wire designations like RHW reflects a focus on matching wire to its application and environment. Recognizing the insulation, temperature rating, and wet-location suitability helps customers select wire appropriate for their commercial and industrial systems.
RHW (Rubber, Heat and moisture resistant, Wet locations, 75 degrees C)
NEC (National Electrical Code), which defines building wire types and uses