XHH
UL Listed 600V XLPE Insulated Building Wire
Conductor: Soft annealed bare copper (Solid or Stranded) per ASTM B3/B8. Aluminum alloy (AA-8000 series) available upon request.
Insulation: Heat and moisture resistant Cross-Linked Polyethylene (XLPE).
Voltage Rating: 600 Volts (Maximum).
Temperature Rating: 90°C for Dry and Damp locations.
Industry Standards: Compliant with UL Standard 44 and National Electrical Code (NEC).
Flame Resistance: VW-1 rated (Vertical Wire Flame Test).
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Product Description
XHH: Product Description and Specifications
Type XHH features flame-retardant, thermoset XLPE (Cross-Linked Polyethylene) insulation rated for 600 Volts. Listed for operation at 90°C in Dry and Damp locations, this conductor provides high dielectric strength and abrasion resistance for installation in recognized raceways. Note: Not listed for use in Wet locations.
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Advantages
XHH : Benefits and Features
High Heat Resistance: Rated 90°C for dry and damp locations.
Durable XLPE Insulation: Superior resistance to abrasion, chemicals, and crushing.
Safety Certified: UL Listed and Flame Retardant (VW-1).
Stable Performance: Rated for 600 Volts with high dielectric strength.
Easy Installation: Low-friction surface for smooth pulling in conduits.
Dimensions/Parameters
| Size (AWG or kcmil) | No. of strands | Insulation Thickness (mils) | Nominal O.D. (mils) | Approx. Net Wt. Per 1000' (lbs.) | Allowable Ampacities 60°C | Allowable Ampacities 75°C | Allowable Ampacities 90°C |
|---|---|---|---|---|---|---|---|
| 8 | 7 | 45 | 227 | 30 | 35 | 40 | 45 |
| 6 | 7 | 45 | 259 | 39 | 40 | 50 | 55 |
| 4 | 7 | 45 | 303 | 57 | 55 | 65 | 75 |
| 2 | 6 | 45 | 358 | 85 | 75 | 90 | 100 |
| 1 | 8 | 55 | 413 | 108 | 85 | 100 | 115 |
| 1/0 | 10 | 55 | 450 | 180 | 115 | 135 | 150 |
| 2/0 | 12 | 55 | 490 | 161 | 115 | 135 | 150 |
| 3/0 | 16 | 55 | 537 | 198 | 130 | 155 | 175 |
| 4/0 | 19 | 55 | 589 | 243 | 150 | 180 | 205 |
| 250 | 22 | 65 | 650 | 293 | 170 | 205 | 230 |
| 300 | 35 | 65 | 700 | 346 | 195 | 230 | 260 |
| 350 | 35 | 65 | 746 | 398 | 210 | 250 | 280 |
| 400 | 35 | 65 | 789 | 449 | 225 | 270 | 305 |
| 500 | 35 | 65 | 866 | 552 | 260 | 310 | 350 |
| 600 | 58 | 80 | 973 | 675 | 285 | 340 | 385 |
| 700 | 58 | 80 | 1037 | 777 | 315 | 375 | 425 |
| 750 | 58 | 80 | 1068 | 829 | 320 | 385 | 435 |
| 900 | 58 | 80 | 1162 | 979 | 355 | 425 | 480 |
| 1000 | 58 | 80 | 1220 | 1085 | 375 | 445 | 500 |
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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 (Meaning of XHH)?
A: NEC Designation.
X: Cross-Linked (XLPE).
HH: High Heat (90°C).
(Note: Lack of “W” indicates no Wet Location rating).
Q: XHH vs. XHHW-2?
A: Environmental Rating.
XHH: Dry & Damp Locations Only (90°C).
XHHW-2: Wet & Dry Locations (90°C). (Note: XHHW-2 is NOT rated for direct burial unless dual-rated USE-2).
Q: Max Temperature?
A: 90°C. (Restricted to Dry and Damp environments).
Q:Outdoor Suitability?
A: No. Not listed for Wet Locations. Must be installed in dry raceways protected from weather/moisture accumulation.
Q: XHH (Thermoset) vs. THHN (Thermoplastic)?
A: Insulation Physics.
XHH (XLPE): Chemical/Heat resistant; thicker insulation; no nylon jacket.
THHN (PVC): Vulnerable to heat deformation; requires nylon jacket for protection.
Q:Voltage Rating?
A: 600V.
Q: Installation Methods?
A: Raceways Only. Designed for Conduits, Tubing, and recognized internal wiring systems.
Q : Conductor Options?
A: Solid or Stranded.
Copper: Soft Annealed.
Aluminum: AA-8000 Series Alloy.