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RHW cable housing wire building wire

November 14, 2018

What's the RHW cable?

The meaning of the RHW cable?

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R: Rubber insulation

This rubber outer layer is very important when it comes to copper cables, especially when those cables are utilized in possible hazardous environments. Performance Wire and Cable’s RHW-2 wires are insulated by cross-linked polyethylene. Even though the “R” stands for rubber, it also incorporates other neoprene insulations that XLPE falls under.

H: Heat resistance of 75 degrees Celsius

Again, cables must be able to withstand the elements. You’ll occasionally see “HH” on some wires, which details the wire’s ability to resist heat up to 90 degrees Celsius. The insulation’s length and width help determine its heat resistance. The thinner the XPLE is, the less resistant it is to heat.

W: Water resistant

Depending on location, this factor could be the most important for your wire. The “W” label even suggests that the cables can be submerged in water if needed. Even if the wire has “R,” which means it is acceptable to use in damp locations, it is wise to keep these wires away from water if the “W” isn’t present. Wires without this “W” label are susceptible to failure and erosion when exposed to water and other liquids.

So, RHW cable is a wire is insulated by rubber or something else (XLPE), can withstand heat up to 75 degrees Celsius, and is water resistant. That’s why RHW cables are regularly found underground in wet locations. However, the NEC lists RHW-2 as having the ability to withstand heats of up to 90 degrees Celsius, a fact that puts our RHW-2 wires ahead of the competitions’ regular RHW wires.


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