From $0.20/ft
128 Products
-
Solid THHN/THWN-2 WireFrom $0.20/ft -
Solid THHN/THWN-2 WireFrom $0.20/ft - Solid THHN/THWN-2 WireFrom $0.20/ft
- Solid THHN/THWN-2 WireFrom $0.20/ft
Parent SKU : ALURDWB-35K-350-1/3
SKU : ALURDWB-35K-350-1/3-250
"High-capacity utility trunking—engineered with tree-retardant XLPE and dual-layer water blocking for maximum 35kV grid durability in high-load underground feeders."
The 350 MCM 35kV URD cable is a primary distribution powerhouse, designed for main-trunk utility feeders and heavy-duty industrial primary services. It is the preferred choice for engineers requiring high current-carrying capacity for urban grid expansions and large-scale industrial infrastructure.
Dual-Layer Water Block Protection: Moisture is the primary catalyst for underground cable failure. This cable utilizes a water-blocking compound in the conductor strands and water-swellable agents in the neutral layer to provide a total longitudinal moisture seal.
Tree-Retardant XLPE (TR-XLPE): The 345-mil insulation wall is comprised of premium TR-XLPE, specifically engineered to inhibit the formation of "water trees," ensuring long-term dielectric stability even in saturated or corrosive soil.
1/3 Concentric Neutral: Featuring 18 x #14 AWG annealed bare copper wires, this 1/3 neutral configuration provides an optimized grounded path for fault currents and superior electrical stress control across the insulation shield.
Stranded 1350-H19 Aluminum: The 350 kcmil aluminum stranded conductor reduces the overall diameter and air gaps, allowing for a more efficient pull through primary duct banks and conduits.
Main Utility Trunk Lines: The primary "artery" of the underground grid, transporting power from substations to regional distribution nodes.
Heavy Industrial Infrastructure: Providing reliable 35kV primary service to refineries, mining operations, and massive data center campuses.
Urban Grid Upgrades: Replacing smaller-gauge primary cables in growing metropolitan areas to increase overall grid capacity.
ENGINEERING OVERVIEW: 350 MCM HEAVY-DUTY FEEDER The 350 MCM 35kV URD cable is optimized for high-capacity primary distribution where environmental resilience is non-negotiable. With a nominal outer diameter of 1.87", this cable is engineered for durability in direct burial or duct installations subject to extreme mechanical and moisture stressors.
APPLICATION: Aluminum Conductor MV-105 35kV water-blocked URD cable is primarily used for primary underground power distribution. It is suitable for use in wet or dry locations, installed in underground ducts or via direct burial.
CONDUCTORS: 350 MCM (350 kcmil) Compact or compressed aluminum 1350-H19 in Class B stranding.
CONDUCTOR WATER BLOCK: Water block compound filled conductor or water swellable tape over the conductor.
INSULATION: TR-XLPE (Tree-Retardant Cross-Linked Polyethylene) in 100% insulation level (345 Mils).
CONCENTRIC NEUTRAL WATER BLOCK: Semi-conducting water-swellable tape over the insulation shield or water-swellable powder between the concentric neutral strands.
CONCENTRIC NEUTRAL: 18 x #14 AWG Annealed bare copper wires (1/3 neutral conductivity).
JACKET: Sunlight resistant XLPE, black with three red stripes for easy high-voltage phase identification.
INDUSTRY STANDARDS & COMPLIANCE:
UL 1072: Listed as Type MV-105
ICEA S-94-649: Concentric Neutral Cables Rated 5 through 46kV
AEIC CS8: Shielded Power Cables Rated 5 through 46kV
Temperature Ratings: 105°C (Normal), 140°C (Emergency), 250°C (Short Circuit)
CABLE MARKING: PRIORITY WIRE AL TR-XLPE 35KV 100% INSUL LEVEL 345 MILS (UL) E364254 TYPE MV-105 XLPE WB SUN RES.
Technical Note: All values are nominal and subject to industry tolerances and manufacturer corrections. Specifications are subject to change without notice. It is the buyer’s responsibility to verify that all materials meet the specific requirements of the project and comply with local electrical codes.
| Wire Size (AWG/MCM) | 350 MCM |
| Conductor Material | Aluminum |
| Conductor Type | Stranded |
| Outer Diameter (OD) (in/mm) | 1.87 in. / 47.50 mm |
| Jacket Type | XLPE |
| Conductor Count | 1 |
| Shield | Shielded |
| Insulation Type | TR-XLPE |
| UL Listing Numbers | UL 1072 |
| Voltage Rating | 35kV |
| Direct Burial Rating | Yes |
| Submersible | No |
| Sunlight Resistance Rating | Yes |
| Temperature Rating | 105ºC |
| Standards | ASTM B230 Aluminum 1350–H19 Wire for Electrical Purposes ASTM B231 Concentric-Lay-Stranded Aluminum 1350 Conductors ASTM B400 Compact Round Concentric-Lay-Stranded Aluminum 1350 Conductors ASTM B3 Soft or Annealed Copper Wire UL 1072 Medium-Voltage Power Cables ICEA S-94-649 Concentric Neutral Cables Rated 5 Through 46KV AEIC CS8 Extruded Dielectric, Shielded Power Cables Rated 5 Through 46KV For 105°C continuous, 140°C emergency overload and 250°C short-circuit operation |
| Miscellaneous Information | All values are nominal and subject to correction. |
| Weight per Foot | 1.524 lb |
In-stock orders placed before 3pm EST typically ship within 1-2 business days. Our business days are Monday through Friday; we do not process orders on Saturday, Sunday, or major US Holidays.
You will receive an e-mail with a tracking number within 1-2 business days from the time its shipped. You will also be able to view your order status and tracking numbers in your account order history.
Expedited shipments are delivered Monday-Friday except on US Holidays. The order must be placed before 12pm CST to ship same day ( Mon-Fri Only).
You have 30 days from the day you receive the item to contact us for a return. Returns are subject to a 30% Restocking Fee.
Please contact us at help@wireamerica.com to request a return authorization. Have your order number or name the order was placed with ready and we will email you an RMA (return) number and instructions for return. Currently, we do not offer exchanges. A new order must be placed if you need a different item. If you provide the new order number at the time of your return request, the restocking fee may be lowered.
Orders on any items with a material value of $50 or less are non-returnable.
Get notified when this product is back in stock
Physical Specifications
Technical Specifications
Packaging & Dimensions:
|
||||||||||||||||||||||||||||||||||
Under standard conditions (90°C conductor, 20°C earth temperature, and 90 RHO soil resistivity), the ampacity for 350 MCM Aluminum is approximately 345 Amps when direct buried and 280 Amps when installed in an underground duct.
⚠️ CUSTOMER WARNING: Actual ampacity must be calculated based on your specific project conditions, including soil thermal resistivity (RHO), burial depth, duct bank configuration, and load factor per NEC Article 311. Consult a licensed electrical engineer for final system design.
The approximate outside diameter for this cable is between 1.35 and 1.45 inches. For a single cable, a 2.5-inch or 3-inch conduit is typically used. For a triplex installation (three cables twisted together), a 4-inch conduit is highly recommended. This ensures you maintain the required 40% fill ratio and provides enough clearance for the cable to move through bends without excessive friction or jacket damage.
Even at 350 MCM, aluminum strands can act as a channel for moisture. This cable features swellable water-blocking agents that expand instantly upon contact with water. This creates a physical dam that stops moisture from traveling longitudinally through the conductor. This is a critical defense against "water treeing," which is a process where moisture weakens the 35kV insulation over time, eventually leading to a dielectric blowout.
The 1/3 Neutral means the copper concentric wires provide a cross-sectional area equal to one-third of the 350 MCM aluminum phase conductor. This is the industry standard for three-phase utility loops where loads are relatively balanced. It provides a reliable path for fault current and grounding while keeping the cable diameter smaller and the overall weight lighter than a full-neutral cable, making it much easier to handle in the field.
To protect the integrity of the 345-mil insulation and the semiconductive shields from mechanical stress, you must adhere to the following limits:
(833) 268-8644
Get this thing filled up so you can help Wire America!