Factory-Direct Supply of Certified Wires and Conductors for Diverse Industrial Applications
Duplex URD Cable Aluminum Secondary Underground Direct Burial Cable 600V
Conductor: 1350-H19 or AA-8000 aluminium, Class B compressed
Insulation: Black XLPE, 60 mils uniform, 90°C dry/wet/burial
Neutral: Black XLPE with yellow stripe — full-size matching phase AWG
Configuration: 1-Phase + Neutral, cabled (Duplex)
Range: AWG 8 to AWG 2, 4 code-name variants
Standard: ICEA S-105-692, UL 854 USE-2 Listed, RUS accepted
Product Overview
Duplex URD Cable is a 600V secondary underground residential distribution cable with one aluminium phase conductor and one aluminium neutral, both XLPE insulated and cabled in a duplex assembly. Manufactured to ICEA S-105-692 and UL 854 as UL Listed USE-2, RUS accepted. Conductors are Class B compressed concentric lay stranded 1350-H19 or AA-8000 aluminium alloy per ASTM B231 / B800 / B801. The phase conductor is black XLPE; the neutral is also black XLPE identified by yellow striping or full yellow jacket. Rated 90°C dry, wet, and direct burial. Duplex is the simplest URD configuration — one phase + one neutral — used for 120V two-wire service drops and street lighting circuits where only single-phase power is required. Four code-name variants from AWG 8 to AWG 2 cover the full residential service entrance range.
Aluminium 1350 / AA-8000
Class B compressed concentric lay. 1350-H19 or AA-8000 alloy per ASTM B231/B800/B801. AWG 8 to AWG 2, all 7-strand construction.
XLPE Insulation (USE-2)
Black thermoset XLPE, 60 mils uniform thickness. 90°C dry/wet/direct burial. UL Listed USE-2. Heat, ozone, oil, and chemical resistant.
1-Phase + Neutral (Duplex)
One black phase conductor + one concentric neutral with yellow stripe. 120V two-wire service — simplest URD configuration for single-phase loads.
600V Secondary Rated
Rated 600V for underground secondary distribution. Direct burial or duct installation, wet and dry locations.
Full-Size Neutral
All four code names use matching phase and neutral AWG sizes (full neutral, not reduced). Simplifies inventory and ensures fault current capacity.
UL / RUS Certified
UL Listed USE-2. RUS accepted for federally funded rural electric projects. ICEA S-105-692 compliant for utility URD installations.
Technical Characteristics
| Rated Voltage | 600V (secondary distribution) |
| Max. Conductor Temperature | 90°C (continuous — dry, wet, and direct burial) |
| Phase Conductor Material | 1350-H19 or AA-8000 aluminium alloy, Class B compressed |
| Standard Phase Insulation | Black thermoset XLPE, 60 mils uniform |
| Neutral Identification | Black XLPE with yellow striping or full yellow jacket |
| Conductor Assembly | 1 phase + 1 neutral, cabled (Duplex) |
| Listing | UL Listed USE-2 (Underground Service Entrance), RUS accepted |
Applicable Standards
| Standard | Scope |
|---|---|
| ICEA S-105-692 | 600V single layer thermoset insulated utility underground distribution cable. Primary construction and testing standard for all URD products. |
| UL 854 | Service Entrance Cables. USE-2 listing for underground service entrance applications in all environmental conditions. |
| ASTM B231 / B800 / B801 | Material standards: B231 (1350 concentric lay), B800 (AA-8000 series alloy), B801 (AA-8000 concentric lay stranded). |
| RUS Accepted | USDA Rural Utilities Service. Required for federally funded rural electric distribution projects. |
URD Family Comparison
| Type | Conductors | Typical Service | Code Names |
|---|---|---|---|
| Duplex URD | 1 × phase + 1 × neutral | 120V two-wire, street lighting | Bard → Everett (4) |
| Triplex URD | 2 × phase + 1 × neutral | 120/240V split-phase residential | Erskine → Fairfield (15) |
| Quadruplex URD | 3 × phase + 1 × neutral | 208Y/120V three-phase commercial | Tulsa → Windham (15) |
Technical Specifications
All data per ICEA S-105-692. Conductor sizes in AWG (North American). Duplex = 1 phase + 1 neutral, cabled. All variants: 7-strand conductors, 60 mils XLPE insulation. Weight in lbs/kft (× 1.488 = kg/km). Diameters in mils. Ampacity per NEC/ICEA tables for 90°C USE-2.
| Code Name | Phase AWG | Phase Strand | Phase Ins. (mils) | Neutral AWG | Neutral Strand | Neutral Ins. (mils) | Phase Dia. (mils) | Cable O.D. (mils) | Weight (lbs/kft) | Ampacity Burial | Ampacity Duct |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Bard | 8 | 7 | 60 | 8 | 7 | 60 | 262 | 524 | 76 | 70 | 55 |
| Clafin | 6 | 7 | 60 | 6 | 7 | 60 | 298 | 596 | 91 | 95 | 70 |
| Delgado | 4 | 7 | 60 | 4 | 7 | 60 | 345 | 690 | 129 | 125 | 90 |
| Everett | 2 | 7 | 60 | 2 | 7 | 60 | 403 | 806 | 189 | 187 | 100 |
Packaging & Delivery
| Parameter | Standard |
|---|---|
| Drum Type | Export wooden drum / iron-wooden drum / as per customer requirement |
| Length per Drum | Standard reels per AWG size; custom cut lengths on request |
| Drum Marking | Manufacturer, URD Duplex, code name, voltage, AWG, length, weight, drum number, UL/RUS marks |
| Cable End Sealing | Heat-shrink end caps to prevent moisture ingress |
| Outer Protection | Weatherproof wrapping for sea freight |
| Delivery Condition | Factory-new, tested per ICEA S-105-692 / UL 854, UL Listed USE-2 |
Typical Applications
Duplex URD is the simplest underground service cable — one phase plus one neutral — for two-wire 120V circuits where only single-phase power is needed. Commonly used for street lighting, individual circuits, and service loops where a Triplex or Quadruplex would be oversized:
Street Lighting
120V two-wire underground circuits for municipal street lighting and area illumination where only single-phase power is required.
Small Service Drops
120V service to small loads such as signs, pumps, irrigation controllers, and outbuildings that don't require split-phase 240V.
Direct Burial
Rated for direct earth burial without conduit. XLPE insulation resists soil acids, moisture, and chemicals for decades of underground service.
Duct Installation
Suitable for pulling through underground ducts in both wet and dry locations. USE-2 listing covers all underground service entrance scenarios.
US Utility Networks
ICEA S-105-692 and RUS accepted. Standard cable for US utility single-phase underground secondary circuits.
Rural Electrification
RUS accepted for USDA-funded projects. Cost-effective aluminium conductor for rural single-phase underground service drops.
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Frequently Asked Questions
As a factory, we offer flexible MOQ depending on the cable type. For standard stock items, MOQ is low; for customized specifications, please contact our sales team for a detailed quote.
Yes, Qiangli cables are manufactured in compliance with international standards such as UL, CE, TUV, and VDE. We provide full test reports and certificates upon request.
Absolutely. We have a dedicated R&D team that can customize cable structure, material, color, and printing to meet your specific project needs.
For standard products, lead time is usually 7-15 days. For large-scale project orders or customized products, it typically ranges from 20 to 30 days.
Yes, we provide free samples for most standard cables. You only need to cover the international courier costs. Contact us to arrange your sample shipment.