What type of wires use rubber insulation that is high heat resistant and is only suitable for dry locations?

The type of wire that uses rubber insulation known for its high heat resistance and is suitable for dry locations is RHW. This designation indicates that the wire is constructed with rubber insulation, which can withstand higher temperatures compared to other types that may be made with different materials like thermoplastic.

RHW wire is specifically intended for applications where the environment remains dry, meaning it should not be used in locations where it may be exposed to moisture or humidity. This trait is crucial because moisture can compromise the electrical insulation properties of the wire, leading to potential failures or electrical hazards.

In contrast, the other wire types, such as RHW-2, THWN, and UF, are designed for different applications and environmental conditions, each with distinct specifications related to moisture-resistant properties and insulation type. Understanding these differences is fundamental when selecting the appropriate wire for a specific installation to ensure safety and compliance with electrical codes.