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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 : ALURD-15K-350
SKU : ALURD-15K-350-250
"The heavy-duty utility standard for high-capacity primary distribution—engineered with 133% TR-XLPE insulation and water-blocked conductors to provide maximum reliability for substation exits and main feeder trunks."
The 350 MCM aluminum cable is designed for main distribution feeders requiring maximum ampacity for high-demand infrastructure. With its 133% insulation level (220 mils), it provides a rugged safety margin for critical grid operations and large-scale industrial circuits.
Water-Blocked Stranded Conductors: This cable features compressed concentric stranded 1350 series aluminum with interstitial spaces filled with a water-blocking compound. This stops longitudinal moisture migration if the cable's integrity is ever compromised.
133% TR-XLPE Insulation: Naturally high dielectric strength Tree-Retardant XLPE insulation resists the formation of "water trees," significantly extending the service life of underground infrastructure in wet environments.
Full Concentric Neutral: Featuring 16 x #9 AWG solid bare copper wires, this 350 MCM cable provides a 100% neutral capacity, ensuring maximum grounding safety and return current capability for high-ampacity systems.
Durable LLDPE Jacket: The black Linear Low-Density Polyethylene jacket is sunlight, abrasion, and heat resistant, marked with the NESC lightning bolt and sequential footage markings for easy field identification.
Substation Exit Feeders: The primary "artery" routing power from the substation into the municipal or cooperative distribution grid.
Critical Infrastructure Power: Providing 15kV primary power to hospitals, large data center campuses, and major industrial facilities.
Main Utility Trunk Lines: Used as the high-capacity backbone for major residential and commercial developments.
ENGINEERING OVERVIEW: 350 MCM 133% PRIMARY
APPLICATION: Primarily used for underground distribution, in direct burial or installed in conduit in wet or dry locations.
VOLTAGE: Rated for 15,000 volts or less.
CONDUCTORS: 350 MCM compressed concentric stranded 1350 series aluminum; stranded conductors are water-blocked.
INSULATION: 220 mils of TR-XLPE (Tree-Retardant Cross-Linked Polyethylene) at 133% insulation level.
CONCENTRIC NEUTRAL: 16 x #9 AWG solid bare copper wires helically applied (Full Neutral).
JACKET: Black LLDPE with three red stripes and NESC lightning bolt.
WEIGHT: Approximately 1,624 lbs/kft.
OVERALL DIAMETER: 1.58 inches.
INDUSTRY STANDARDS & COMPLIANCE:
UL Listed: Type MV-90
Standards: ANSI/ICEA S-94-649, AEIC CS-8, and ASTM B230/B231/B609
RUS ACCEPTED
Temperature Ratings: 90°C Normal, 130°C Emergency, 250°C Short Circuit
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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.
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| Wire Size (AWG/MCM) | 350 MCM |
| Conductor Material | Aluminum |
| Conductor Type | Stranded |
| Strand Count | 37 |
| Outer Diameter (OD) (in/mm) | 1.58 in. / 40.13 mm |
| Jacket Type | LLDPE |
| Conductor Count | 1 |
| Shield | Shielded |
| Insulation Type | TR-XLPE |
| UL Listing Numbers | UL - MV90 |
| Voltage Rating | 15kV |
| Direct Burial Rating | Yes |
| Sunlight Resistance Rating | Yes |
| Temperature Rating | 90ºC |
| Standards | ASTM B230, B231, B609 ANSI/ICEA S-94-649 UL - MV90 AEIC CS-8 RUS ACCEPTED For 90°C continuous, 130°C emergency and 250°C shortcircuit operation |
| Miscellaneous Information | All values are nominal and subject to correction. |
| Weight per Foot | 1.624 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.
Parent SKU : ALURD-15K-350
SKU : ALURD-15K-350-250
Parent SKU : ALURD-15K-350
SKU : ALURD-15K-350-250
"The heavy-duty utility standard for high-capacity primary distribution—engineered with 133% TR-XLPE insulation and water-blocked conductors to provide maximum reliability for substation exits and main feeder trunks."
The 350 MCM aluminum cable is designed for main distribution feeders requiring maximum ampacity for high-demand infrastructure. With its 133% insulation level (220 mils), it provides a rugged safety margin for critical grid operations and large-scale industrial circuits.
Water-Blocked Stranded Conductors: This cable features compressed concentric stranded 1350 series aluminum with interstitial spaces filled with a water-blocking compound. This stops longitudinal moisture migration if the cable's integrity is ever compromised.
133% TR-XLPE Insulation: Naturally high dielectric strength Tree-Retardant XLPE insulation resists the formation of "water trees," significantly extending the service life of underground infrastructure in wet environments.
Full Concentric Neutral: Featuring 16 x #9 AWG solid bare copper wires, this 350 MCM cable provides a 100% neutral capacity, ensuring maximum grounding safety and return current capability for high-ampacity systems.
Durable LLDPE Jacket: The black Linear Low-Density Polyethylene jacket is sunlight, abrasion, and heat resistant, marked with the NESC lightning bolt and sequential footage markings for easy field identification.
Substation Exit Feeders: The primary "artery" routing power from the substation into the municipal or cooperative distribution grid.
Critical Infrastructure Power: Providing 15kV primary power to hospitals, large data center campuses, and major industrial facilities.
Main Utility Trunk Lines: Used as the high-capacity backbone for major residential and commercial developments.
ENGINEERING OVERVIEW: 350 MCM 133% PRIMARY
APPLICATION: Primarily used for underground distribution, in direct burial or installed in conduit in wet or dry locations.
VOLTAGE: Rated for 15,000 volts or less.
CONDUCTORS: 350 MCM compressed concentric stranded 1350 series aluminum; stranded conductors are water-blocked.
INSULATION: 220 mils of TR-XLPE (Tree-Retardant Cross-Linked Polyethylene) at 133% insulation level.
CONCENTRIC NEUTRAL: 16 x #9 AWG solid bare copper wires helically applied (Full Neutral).
JACKET: Black LLDPE with three red stripes and NESC lightning bolt.
WEIGHT: Approximately 1,624 lbs/kft.
OVERALL DIAMETER: 1.58 inches.
INDUSTRY STANDARDS & COMPLIANCE:
UL Listed: Type MV-90
Standards: ANSI/ICEA S-94-649, AEIC CS-8, and ASTM B230/B231/B609
RUS ACCEPTED
Temperature Ratings: 90°C Normal, 130°C Emergency, 250°C Short Circuit
Â
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.
Â
| Wire Size (AWG/MCM) | 350 MCM |
| Conductor Material | Aluminum |
| Conductor Type | Stranded |
| Strand Count | 37 |
| Outer Diameter (OD) (in/mm) | 1.58 in. / 40.13 mm |
| Jacket Type | LLDPE |
| Conductor Count | 1 |
| Shield | Shielded |
| Insulation Type | TR-XLPE |
| UL Listing Numbers | UL - MV90 |
| Voltage Rating | 15kV |
| Direct Burial Rating | Yes |
| Sunlight Resistance Rating | Yes |
| Temperature Rating | 90ºC |
| Standards | ASTM B230, B231, B609 ANSI/ICEA S-94-649 UL - MV90 AEIC CS-8 RUS ACCEPTED For 90°C continuous, 130°C emergency and 250°C shortcircuit operation |
| Miscellaneous Information | All values are nominal and subject to correction. |
| Weight per Foot | 1.624 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:
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The overall jacket diameter for 350 MCM 15kV 133% URD is 1.58 inches. For a single-conductor installation, a 3-inch conduit is the standard minimum. For a triplex configuration (three cables), a 5-inch or 6-inch conduit is recommended. Due to the 1.58" OD and high weight, a 5-inch conduit is the baseline for a safe pull to avoid "jamming" and to stay within the NEC 40% fill limit.
Note on Conduit Sizing: These recommendations are based on standard NEC 40% fill guidelines for general informational purposes. Because factors such as pull length, total degrees of bends, and pulling tension vary by project, always consult with a licensed electrical engineer or project lead to verify final conduit specifications and ensure local code compliance.
This 350 MCM cable features 16 x #9 AWG solid bare copper neutral wires. These wires are helically applied and uniformly spaced over the insulation shield to provide 100% (Full) conductivity relative to the 350 MCM aluminum phase conductor, providing maximum grounding performance for high-load primary feeders.
RUS Accepted means this cable meets the technical and durability standards set by the Rural Utilities Service (USDA). This is a critical requirement for contractors working on federally funded rural electrification projects, ensuring the cable is vetted for long-term reliability in utility-grade infrastructure.
For 350 MCM main feeders, 133% insulation (220 mils) provides a critical safety buffer. High-capacity feeders often carry the highest electrical loads on the grid; the extra TR-XLPE thickness ensures the system can withstand surge stresses significantly better than standard 100% rated cables.
The minimum bending radius for 350 MCM 15kV URD is approximately 19 inches. Per industry standards, the radius is calculated as 12 times the overall diameter of the cable (1.58" x 12). Maintaining this radius is vital during the installation of heavy 350 MCM feeders to protect the core and concentric neutrals from mechanical stress during the pull.
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