1. Understanding XHHW and XHHW-2 Wire
1.1 What is XHHW Wire?
XHHW stands for Cross-Linked Polyethylene High Heat-Resistant Water-Resistant. This thermoset-insulated cable is designed for both dry and damp locations, with a maximum operating temperature of 90°C in dry environments and 75°C in wet conditions. Its cross-linked polyethylene (XLPE) insulation provides superior resistance to heat, chemicals, and abrasion compared to traditional PVC-insulated wires.
Common applications include:
Commercial and industrial power distribution
Service entrance conductors
Conduit and cable tray installations
Popular variants like 4/0 XHHW wire 1000V are ideal for high-voltage applications, offering robust performance in demanding environments.
1.2 What is XHHW-2 Wire?
XHHW-2 is an upgraded version of XHHW, rated for 90°C in both wet and dry conditions. This certification makes it suitable for a broader range of installations, including direct burial (when specified). The "-2" suffix indicates compliance with stricter UL standards, particularly for moisture resistance.
For example, XHHW-2 copper 600V is commonly used in residential and light commercial circuits where consistent performance in damp environments is critical.
2. Key Differences Between XHHW and XHHW-2
2.1 Voltage Ratings
XHHW: Rated up to 1000V for larger gauges (e.g., 4/0 XHHW wire 1000V) and 600V for smaller sizes.
XHHW-2: Typically capped at 600V across all gauges, as seen in XHHW-2 copper 600V cables.
2.2 Temperature Tolerance
XHHW supports 90°C (dry) / 75°C (wet).
XHHW-2 maintains 90°C in both dry and wet conditions.
2.3 Applications
XHHW aluminum wire is favored for cost-effective, high-ampacity projects like feeder lines.
XHHW-2 is preferred for outdoor or underground installations requiring moisture resistance.
3. Advantages of XHHW Wire
3.1 Cost-Effectiveness
Aluminum variants like XHHW aluminum wire and 2AWG XHHW aluminum wire 1000V offer significant savings over copper, especially in large-scale projects. While aluminum has lower conductivity, its lightweight nature reduces installation costs.
3.2 High Voltage Capacity
The 4/0 XHHW wire 1000V exemplifies the cable's ability to handle high-voltage applications, such as industrial machinery and solar farms.
3.3 Durability
XHHW's XLPE insulation resists:
Heat degradation
Chemical exposure (oils, acids)
Physical wear
3.4 Flexibility
Smaller gauges like 2AWG XHHW aluminum wire 1000V are easier to route through conduits, reducing labor time.
4. XHHW Aluminum vs. Copper Conductors
4.1 XHHW Aluminum Wire
Pros: Lightweight, affordable, and corrosion-resistant. Ideal for long-distance power transmission.
Cons: Requires larger gauges to match copper's ampacity (e.g., 2AWG XHHW aluminum wire 1000V vs. 4 AWG copper).
4.2 XHHW Copper Wire
Pros: Higher conductivity, smaller size for equivalent current capacity.
Cons: More expensive and heavier.
5. Applications of XHHW Cable
Commercial Buildings: Powering HVAC systems, lighting, and panels.
Industrial Facilities: Heavy machinery and motor circuits.
Renewable Energy: Solar farms using 4/0 XHHW wire 1000V for high-voltage connections.
Service Entrances: Aluminum XHHW cables reduce costs for utility connections.
6. Technical Specifications Comparison
| Feature | XHHW | XHHW-2 |
|---|---|---|
| Voltage Rating | Up to 1000V (large gauges) | 600V |
| Temperature | 90°C (dry) / 75°C (wet) | 90°C (dry & wet) |
| Conductor Material | Copper or Aluminum | Copper |
| Moisture Resistance | Good | Excellent |
7. SEO-Optimized Product Examples
4/0 XHHW Wire 1000V: Perfect for high-voltage feeders in industrial settings.
XHHW-2 Copper 600V: Reliable for wet-location residential circuits.
2AWG XHHW Aluminum Wire 1000V: Budget-friendly solution for solar arrays.
Dongguan Greater Wire & Cable Co., Ltd.'s price advantage makes us highly competitive in the US cable market. Our large-scale production and high production efficiency can effectively reduce costs. The R&D team continuously optimizes product performance to meet the needs of the US market. Our products have passed UL83, UL44, UL719 and other certifications, and XHHW quality is guaranteed. The price is 25% lower than that of local US brands, providing you with high-quality, low-priced cables, which is a wise choice for your project.