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Parent SKU : ALURDWB-35K-750-1/3
SKU : ALURDWB-35K-750-1/3-250
"High-capacity transmission feeder for utility-scale grids—engineered with tree-retardant XLPE and dual-layer water blocking for maximum 35kV reliability in ultra-high-load underground circuits."
The 750 MCM 35kV URD cable is a premier primary conductor designed for the highest-capacity underground distribution systems. It is the preferred choice for utility engineers managing urban grid expansions or providing primary power to massive industrial complexes where 500 MCM does not provide sufficient ampacity.
Dual-Layer Water Block Protection: On a conductor this large, moisture ingress can be catastrophic. This cable utilizes specialized water-blocking compounds in the conductor strands and water-swellable agents in the neutral layer to create a permanent longitudinal moisture seal.
Tree-Retardant XLPE (TR-XLPE): Featuring a 345-mil insulation wall, the TR-XLPE is chemically formulated to inhibit the formation of "water trees," ensuring the cable remains electrically stable even under the heat and stress of maximum current loads in damp soil.
1/3 Concentric Neutral: Featuring 24 x #12 AWG annealed bare copper wires, this configuration provides a robust grounding path and superior electrical stress control for high-load utility systems.
Stranded 1350-H19 Aluminum: The 750 kcmil core provides maximum tensile strength while keeping the outer diameter as slim as possible for installation in heavy-duty duct banks.
Substation Exit Feeders: Carrying massive primary loads from utility substations to regional distribution hubs.
Major Industrial Infrastructure: Providing reliable 35kV primary service to refineries, steel mills, and massive data center campuses.
Urban Grid Expansion: The "backbone" cable for upgrading city electrical grids to handle increased population density and power demands.
ENGINEERING OVERVIEW: 750 MCM HEAVY TRANSMISSION FEEDER The 750 MCM 35kV URD cable is optimized for primary distribution applications requiring extreme current density and long-term environmental resilience. With a robust nominal outer diameter of approximately 2.33", this cable is engineered for the rigors of direct burial or duct installation in the most demanding utility environments.
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: 750 MCM (750 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: 24 x #12 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) | 750 MCM |
| Conductor Material | Aluminum |
| Conductor Type | Stranded |
| Outer Diameter (OD) (in/mm) | 2.23 in. / 56.64 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 | 2.47 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.
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Physical Specifications
Technical Specifications
Packaging & Dimensions:
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For a single conductor installed in an underground environment (90°C conductor, 20°C ambient earth, 90 RHO):
The "Maximum" Number: 565 Amps. This is for direct burial (no duct).
Pro Tip: If you are "triplexing" these cables (twisting three together), remember that heat dissipation is slightly reduced, and you should verify de-rating factors based on your specific duct bank configuration.
The Customer Warning: “Actual ampacity must be calculated based on your specific soil RHO, duct bank configuration, and load factor per NEC Article 311.”
While it varies by manufacturer (e.g., Southwire, Prysmian, or Okonite), a 750 MCM 35kV cable with 100% insulation typically has an OD of approximately 1.75 to 1.85 inches.
The 100% insulation level is the utility standard for grounded systems.
Aluminum is prone to corrosion if moisture is trapped within the strands.
Adhering to the bending radius is critical to prevent damaging the semiconductive layers and the concentric neutrals.
Note: Because 750 MCM is more flexible than 1000 MCM, installers are often tempted to "over-bend" it in tight switchgear. Use a mandrel or template to ensure these limits aren't exceeded.
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