What is XHHW cable?

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XHHW is a letter or abbreviation, which means "XLPE (cross-linked polyethylene) high heat and water resistance". XHHW is the name of specific insulating materials, temperature grades and conditions of use (applicable to humid places) for wires and cables.

Wires with XHHW insulation are commonly used in alternating current (AC) power distribution systems in commercial, public institutions, and industrial buildings and facilities, usually at a voltage level (potential difference or electromotive force) of 110-600 volts. This insulation can be used for solid or stranded copper and aluminum conductors, depending on the size.

According to Underwriters Laboratories (UL) Standard 44, XHHW insulation materials are suitable for use in dry locations up to 90°C (194°F) or wet locations up to 75°C (167°F).

XHHW-2 insulation material is similar to XHHW, and is suitable for dry or humid places with a maximum of 90°C (194°F).

The insulation of XHHW / XHHW-2 electrical conductors is subject to the following industry standards:

• UL 44

• CSA c22.2. No. 38

• ASTM-B3

• ASTM-B8

• ASTM-B800

• ASTM-B801

• NFPA 70 -2008 (NEC code)

• United States Federal Regulation J-C 30B

• NEMA WC70 / ICEA S-95-658



The aluminum wire used in some households from the mid-1960s to the early 1970s has a potential fire hazard. How safe is the aluminum wire? According to the US Consumer Product Safety Commission, this danger is reported to cause fire and even death. Problems caused by expansion, or more likely fretting and arcing at the connector, may cause overheating at the connection or joint between the wire and the device (switch and socket). The connection may become very hot and may even cause a fire without tripping the circuit breaker!



It seems that there are fewer splicing problems. They also make "approved" things that look just like the things you want to use. Finally, although many people live in it at home, replacing it is not a bad suggestion.



I don't remember how aluminum and copper react, but over time, any joints of these metals may have problems (I don't remember), although the fusion splicer you are looking for seems to be exactly what you need. More than 8AWG cables are not used for wiring in new houses, and many aluminum wires are used throughout North America. Larger size terminals provide an excellent choice because the most common terminals in larger sizes are dual-rated lugs made of aluminum alloy. Properly terminated aluminum wire should be considered safe, because long-term installation has proven its reliability. Aluminum wire is commonly used in residential applications for service entrances and large branch circuit loads such as range and air conditioning units.

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