Category Archive: XHHW Cables & Wire

XHHW-2 Aluminum Wire & Cables

What To Look For in XHHW-2 Cables

XHHW-2 is an acronym for XLPE (cross-linked polyethylene) High Heat-resistant Water-resistant. These cables are designed to withstand high temperatures and harsh environments and are commonly used for power distribution, lighting, and control circuits. Moreover, their excellent thermal and electrical properties make XHHW-2 cables a reliable choice for a wide range of industrial and commercial applications.

To choose the right XHHW-2 cable for your needs, it’s essential to understand its features and specifications. This article will delve into the important aspects of XHHW-2 cables that you must consider when choosing the right cable for your application.

Key Factors To Consider When Selecting XHHW-2 Cables

The following are the key considerations when selecting XHHW-2 cables:


The ampacity is determined by the size of the cable’s conductor and the type of insulation used. When selecting an XHHW-2 cable, it is important to consider the ampacity rating based on the amount of current that your specific application requires.

Voltage Rating

The voltage rating of an XHHW-2 cable refers to the maximum voltage at which the cable can operate safely. It’s essential to choose a cable with a voltage rating that meets or exceeds the requirements of your specific application. Failure to do so could result in safety hazards and equipment damage.

Conductor Size

The conductor size determines the amount of electrical current the cable can safely carry. Choosing a cable with a conductor size that’s too small for your application could result in overheating and potential risks.

Insulation Material

The insulation material of an XHHW-2 cable plays a vital role in protecting the conductor from damage and ensuring the cable’s durability. XLPE is the insulation material for XHHW-2 cables due to its excellent electrical properties and resistance to heat and moisture.

Temperature Rating

The temperature rating of a cable refers to the maximum temperature at which the cable can safely operate without deteriorating or melting. For example, XHHW-2 cables typically have temperature ratings of 75 °C, 90 °C, or 110 °C.

If the cable is exposed to higher temperatures than its rating, it can become damaged and fail, leading to costly downtime and potentially hazardous situations. On the other hand, choosing a cable with a lower temperature rating than necessary can result in inefficiencies and reduced performance.

Cable Tray (CT) Marking

There are many building wire installations where single conductors, such as XHHW-2 are used. The NEC (National Electrical Code) Article 392 recognizes single conductor cables for use in cable trays (CT) where the conductor is marked “CT” or more commonly, “FOR CT USE”.

Not all manufacturers offer XHHW-2 with the CT marking, as this marking is optional under UL 44 and UL 83. Many distributors and contractors assume all XHHW-2 is the same, however, it is not. All Classic Wire XHHW-2, sized 1/0 AWG and larger, are marked “FOR CT USE”.

There are a few requirements that the single conductor must satisfy in order to be marked for use in cable tray (CT):

  1. The single conductor must be a circuit conductor sized 1/0 AWG or larger, or an equipment grounding conductor sized 4 AWG or larger; and
  2. Flame tested using the vertical-tray flame test (“Method 1 – vertical tray” in UL 2556), or the FT4 vertical-tray flame test (“Method 2 – FT4” in UL 2556).

Applications of XHHW-2 Cables

Here are some of the most common applications of XHHW-2 cables in industrial and commercial projects:

  • Power distribution
  • Motor connections
  • Lighting
  • Control wiring
  • HVAC systems
  • Renewable energy

Get Top-Quality XHHW-2 Cables at Classic Wire Cable

If you’re looking for the best XHHW-2 cables for your project, Classic Wire Cable has your back! Our team of experienced industry professionals is committed to providing exceptional customer service and expertise to help electrical distributors succeed. In addition, we have a knowledgeable sales team, boast access to local NEMRA-affiliated representatives, and offer value-added services to help give you a competitive edge.

Contact us today to learn more about our products and services, or request a quote to place your order!