XHHW
600V XLPE Insulated Building Wire for Industrial & Commercial Use
Conductor Material
Soft annealed copper (Solid or Stranded).
AA-8000 series aluminum alloy (Stranded).
Insulation: Cross-Linked Polyethylene (XLPE).
Temperature Ratings
Dry Locations: Up to 90°C.
Wet Locations: Up to 75°C.
Voltage Rating: 600 Volts.
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Product Description
XHHW : Product Description and Specifications
Type XHHW designates a single-conductor 600V building wire for installation in recognized raceways. Featuring thermoset Cross-Linked Polyethylene (XLPE) insulation over annealed copper or aluminum conductors, this specification is rated for continuous operation at 90°C in Dry locations and 75°C in Wet locations. The integral XLPE insulation provides required mechanical resistance to abrasion, heat, and chemicals without the inclusion of a nylon jacket, complying with UL 44 standards.
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Advantages
XHHW : Benefits and Features
Superior Durability: The XLPE insulation is physically tougher and more resistant to abrasion and crushing than standard PVC (THHN) wire.
Chemical Resistance: Excellent resistance to acids, alkalis, oils, and industrial chemicals.
Moisture Resistance: Designed to withstand damp environments and moisture ingress (up to 75°C).
Flame Retardant: Formulated to resist spreading fire; XLPE typically produces less toxic smoke than PVC during combustion.
Installation Efficiency: The surface is naturally smooth and robust, often making it easier to pull through conduits without damage compared to nylon-jacketed wires.
No Creep/Flow: Being a thermoset material, the insulation will not melt or flow under overload conditions like thermoplastic (PVC) materials might.
Dimensions/Parameters
| Size (AWG or kcmil) | No. of strands | Insulation Thickness (mils) | Nominal O.D. (mils) | Approx. Net Wt. Per 1000' (lbs.) | Ampacity 60°C | Ampacity 75°C | Ampacity 90°C |
|---|---|---|---|---|---|---|---|
| 14* | 7 | 30 | 130 | 18 | 15 | 15 | 15 |
| 12* | 1 | 30 | 141 | 24 | 20 | 20 | 20 |
| 10* | 1 | 30 | 147 | 26 | 30 | 30 | 30 |
| 12* | 7 | 30 | 162 | 37 | 20 | 20 | 20 |
| 10* | 7 | 30 | 171 | 40 | 30 | 30 | 30 |
| 8 | 7 | 45 | 232 | 65 | 40 | 50 | 55 |
| 6 | 7 | 45 | 268 | 96 | 55 | 65 | 75 |
| 4 | 7 | 45 | 311 | 147 | 70 | 85 | 95 |
| 3 | 7 | 45 | 337 | 183 | 85 | 100 | 115 |
| 2 | 7 | 45 | 367 | 227 | 95 | 115 | 130 |
| 1 | 19 | 55 | 435 | 291 | 110 | 130 | 145 |
| 1/0 | 19 | 55 | 477 | 363 | 125 | 150 | 170 |
| 2/0 | 19 | 55 | 521 | 453 | 145 | 175 | 195 |
| 3/0 | 19 | 55 | 571 | 565 | 165 | 200 | 225 |
| 4/0 | 19 | 55 | 627 | 706 | 195 | 230 | 260 |
| 250 | 37 | 65 | 695 | 835 | 215 | 255 | 290 |
| 300 | 37 | 65 | 748 | 995 | 240 | 285 | 320 |
| 350 | 37 | 65 | 798 | 1155 | 260 | 310 | 350 |
| 400 | 37 | 65 | 843 | 1314 | 280 | 335 | 380 |
| 500 | 37 | 65 | 927 | 1633 | 320 | 380 | 430 |
| 600 | 61 | 80 | 1033 | 1965 | 350 | 420 | 475 |
| 700 | 61 | 80 | 1102 | 2282 | 385 | 460 | 520 |
| 750 | 61 | 80 | 1135 | 2440 | 400 | 475 | 535 |
| 1000 | 61 | 80 | 1284 | 3229 | 455 | 545 | 615 |
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Production Processes Of UL cable
JOCA produces UL wires using a fully automated workflow. The cycle synchronizes copper drawing and stranding with precise PVC or XLPE extrusion. Instead of waiting for post-production checks, we employ continuous inline monitoring—using laser diameter gauges and spark testers to catch defects instantly. For multi-core variants, the line handles cabling, shielding, and jacketing to exact specifications. Before shipping, every batch faces final electrical and mechanical inspections to verify full compliance with UL standards.
Packing For Shipment
To meet various transportation needs, there are many methods of packaging that can be used.
Have more questions?
Q: Nomenclature Definition?
A: NEC Designation.
X: Cross-Linked (XLPE).
HH: High Heat (90°C Dry).
W: Water Resistant.
Q: XHHW vs. XHHW-2?
A: Wet Temperature Limit.
XHHW: 75°C (Wet) / 90°C (Dry).
XHHW-2: 90°C (Wet & Dry).
Q: Jacket Construction (vs. THHN)?
A: Non-Jacketed. Features integral Thermoset XLPE insulation only. No outer nylon sheath required (unlike Thermoplastic THHN).
Q:Voltage Rating?
A: 600V. General purpose NEC power distribution.
Q: Wet Location Capability?
A: Restricted. Approved for Wet Locations, but derated to 75°C maximum operation. (90°C permitted in Dry locations only).
Q: XLPE (XHHW) vs. PVC (THHN)?
A: Material Properties.
Thermoset (XHHW): Superior dielectric constant, chemical resistance, and overload stability.
Thermoplastic (THHN): Lower cost, thinner OD.
Q: Sunlight Resistance?
A: Specification Dependent. Not inherent to standard XHHW. Must be explicitly listed and marked “Sunlight Resistant” for outdoor use.
Q : Conductor Availability?
A: Standard Options.
Copper: Solid or Stranded (Soft Annealed).
Aluminum: AA-8000 Series Alloy (Stranded).