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 : SLP-4URD
SKU : SLP-4URD-100
"The industry-standard for high capacity secondary three-phase power distribution. Engineered for reliable 600V delivery, this cable is rated for both direct burial and duct installations, featuring sunlight-resistant XLPE insulation for maximum long-term underground performance in high-demand environments."
The Slippery Rock 350 MCM Quadruplex is the heavy-duty solution for secondary underground three-phase power. Specifically designed for massive projects requiring three phase conductors and a reduced neutral, it provides a stable, high-performance solution for large-scale apartment complexes, industrial parks, heavy-load agricultural feeds, and much more. Utilizing high-conductivity 1350-H19 aluminum and a premium, sunlight-resistant XLPE insulation, it ensures superior resistance to environmental stress, heat, and moisture.
High Ampacity: Rated for 385 Amps (Direct Burial) and 305 Amps (In Duct), making it a primary choice for high-amperage feeders.
Sunlight-Resistant XLPE: Advanced cross-linked polyethylene insulation offers robust protection against UV exposure at termination points.
Easy-Identify Neutral: The 4/0 AWG reduced neutral conductor features three extruded yellow stripes for safer identification and maintenance.
Direct Burial Ready: Engineered for the most demanding underground utility conditions; can be installed directly in a trench or through heavy-duty conduit systems.
ENGINEERING OVERVIEW: 350 Quadruplex URD (Reduced Neutral)
Application: High-load secondary distribution, commercial service entrances, and industrial power feeds.
Voltage Rating: 600 Volts.
UL Listing: UL 854 (Service-Entrance Cable).
Conductor Material: Stranded 1350-H19 Series Aluminum.
Phase Insulation: Black Sunlight-Resistant XLP (Cross-Linked Polyethylene).
Neutral Insulation: Black XLP with 3 extruded yellow stripes for easy phase identification.
Temperature Rating: 90°C (Wet or Dry).
Phase Conductor Size: 350 MCM (kcmil).
Neutral Conductor Size: 4/0 AWG (Reduced Neutral).
Outside Diameter (OD): 2.05 inches (52.07 mm)
Ampacity (Direct Burial): 385 Amps.
Ampacity (In Duct/Conduit): 305 Amps.
Compliance Standards: UL 854; Type USE-2; ASTM B-231, B-609, B-901; RUS Accepted.
Utility Distribution Hubs: The go-to feeder for providing high-capacity secondary power from utility transformers to major distribution tap boxes.
Large Industrial Complexes: Perfect for powering heavy machinery, manufacturing plants, and industrial warehouses with massive electrical demands.
Large Apartment Meter Banks: Used as the main underground feeder for apartment complexes where hundreds of units require a centralized, high-amperage power source.
Heavy Agricultural Facilities: The standard for powering large-scale grain elevators, extensive irrigation systems, and commercial-scale dairy or poultry farms.
Retail Mega-Centers: Ideal for big-box retail stores, shopping malls, and large commercial centers requiring high ampacity service.
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.
Ampacity: 90°C conductor temperature, 20°C ambient temperature, RHO 90, 100% load factor. Single and Quadruplex based on 3/C. Neutral wire carries unbalanced load only. Reference NEC article 310.15 for NEC installations.
Â
| Wire Size (AWG/MCM) | 350 MCM |
| Conductor Material | Aluminum |
| Conductor Type | Stranded |
| Strand Count | 19 |
| Outer Diameter (OD) (in/mm) | 2.05 in. / 52.07 mm |
| Jacket Type | XLPE |
| Conductor Count | 4 |
| Shield | Unshielded |
| Insulation Type | (XLPE) Cross-Linked Polyethylene |
| Voltage Rating | 600 |
| Ampacity Rating | 385 |
| Direct Burial Rating | Yes |
| Submersible | No |
| Flexibility Rating | Low |
| Sunlight Resistance Rating | Yes |
| Temperature Rating | 90ºC |
| Standards | ASTM B-230 Aluminum 1350-H19 Wire for Electrical Purposes ASTM B-231 Concentric-Lay-Stranded Aluminum 1350 Conductors ASTM B-609 Aluminum 1350 Round Wire, Annealed and Intermediate Tempers, for Electrical Purposes ASTM B-901 Compressed Round Stranded Aluminum Conductors Using Single Input Wire Construction ICEA S-105-692 600 Volt Single Layer Thermoset Insulated Utility Underground Distribution Cables Federal Specification A-A-59544A UL 854 Service-Entrance Cables Sunlight Resistant RUS Accepted |
| Miscellaneous Information | All values are nominal and subject to correction. *Not RUS accepted size **Ampacity: 90°C conductor temperature, 20°C ambient temperature, RHO 90, 100% load factor. Single and Quadruplex based on 3/C. Neutral wire carries unbalanced load only. Reference NEC article 310.15 for NEC installations. |
| Primary Applications | Underground Secondary Power Distribution |
| Common Uses |
|
| Weight per Foot | 1.598 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 : SLP-4URD
SKU : SLP-4URD-100
Parent SKU : SLP-4URD
SKU : SLP-4URD-100
"The industry-standard for high capacity secondary three-phase power distribution. Engineered for reliable 600V delivery, this cable is rated for both direct burial and duct installations, featuring sunlight-resistant XLPE insulation for maximum long-term underground performance in high-demand environments."
The Slippery Rock 350 MCM Quadruplex is the heavy-duty solution for secondary underground three-phase power. Specifically designed for massive projects requiring three phase conductors and a reduced neutral, it provides a stable, high-performance solution for large-scale apartment complexes, industrial parks, heavy-load agricultural feeds, and much more. Utilizing high-conductivity 1350-H19 aluminum and a premium, sunlight-resistant XLPE insulation, it ensures superior resistance to environmental stress, heat, and moisture.
High Ampacity: Rated for 385 Amps (Direct Burial) and 305 Amps (In Duct), making it a primary choice for high-amperage feeders.
Sunlight-Resistant XLPE: Advanced cross-linked polyethylene insulation offers robust protection against UV exposure at termination points.
Easy-Identify Neutral: The 4/0 AWG reduced neutral conductor features three extruded yellow stripes for safer identification and maintenance.
Direct Burial Ready: Engineered for the most demanding underground utility conditions; can be installed directly in a trench or through heavy-duty conduit systems.
ENGINEERING OVERVIEW: 350 Quadruplex URD (Reduced Neutral)
Application: High-load secondary distribution, commercial service entrances, and industrial power feeds.
Voltage Rating: 600 Volts.
UL Listing: UL 854 (Service-Entrance Cable).
Conductor Material: Stranded 1350-H19 Series Aluminum.
Phase Insulation: Black Sunlight-Resistant XLP (Cross-Linked Polyethylene).
Neutral Insulation: Black XLP with 3 extruded yellow stripes for easy phase identification.
Temperature Rating: 90°C (Wet or Dry).
Phase Conductor Size: 350 MCM (kcmil).
Neutral Conductor Size: 4/0 AWG (Reduced Neutral).
Outside Diameter (OD): 2.05 inches (52.07 mm)
Ampacity (Direct Burial): 385 Amps.
Ampacity (In Duct/Conduit): 305 Amps.
Compliance Standards: UL 854; Type USE-2; ASTM B-231, B-609, B-901; RUS Accepted.
Utility Distribution Hubs: The go-to feeder for providing high-capacity secondary power from utility transformers to major distribution tap boxes.
Large Industrial Complexes: Perfect for powering heavy machinery, manufacturing plants, and industrial warehouses with massive electrical demands.
Large Apartment Meter Banks: Used as the main underground feeder for apartment complexes where hundreds of units require a centralized, high-amperage power source.
Heavy Agricultural Facilities: The standard for powering large-scale grain elevators, extensive irrigation systems, and commercial-scale dairy or poultry farms.
Retail Mega-Centers: Ideal for big-box retail stores, shopping malls, and large commercial centers requiring high ampacity service.
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.
Ampacity: 90°C conductor temperature, 20°C ambient temperature, RHO 90, 100% load factor. Single and Quadruplex based on 3/C. Neutral wire carries unbalanced load only. Reference NEC article 310.15 for NEC installations.
Â
| Wire Size (AWG/MCM) | 350 MCM |
| Conductor Material | Aluminum |
| Conductor Type | Stranded |
| Strand Count | 19 |
| Outer Diameter (OD) (in/mm) | 2.05 in. / 52.07 mm |
| Jacket Type | XLPE |
| Conductor Count | 4 |
| Shield | Unshielded |
| Insulation Type | (XLPE) Cross-Linked Polyethylene |
| Voltage Rating | 600 |
| Ampacity Rating | 385 |
| Direct Burial Rating | Yes |
| Submersible | No |
| Flexibility Rating | Low |
| Sunlight Resistance Rating | Yes |
| Temperature Rating | 90ºC |
| Standards | ASTM B-230 Aluminum 1350-H19 Wire for Electrical Purposes ASTM B-231 Concentric-Lay-Stranded Aluminum 1350 Conductors ASTM B-609 Aluminum 1350 Round Wire, Annealed and Intermediate Tempers, for Electrical Purposes ASTM B-901 Compressed Round Stranded Aluminum Conductors Using Single Input Wire Construction ICEA S-105-692 600 Volt Single Layer Thermoset Insulated Utility Underground Distribution Cables Federal Specification A-A-59544A UL 854 Service-Entrance Cables Sunlight Resistant RUS Accepted |
| Miscellaneous Information | All values are nominal and subject to correction. *Not RUS accepted size **Ampacity: 90°C conductor temperature, 20°C ambient temperature, RHO 90, 100% load factor. Single and Quadruplex based on 3/C. Neutral wire carries unbalanced load only. Reference NEC article 310.15 for NEC installations. |
| Primary Applications | Underground Secondary Power Distribution |
| Common Uses |
|
| Weight per Foot | 1.598 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
Usage & Installation:
Packaging & Dimensions:
|
||||||||||||||||||||||||||||||||||||||||||
Note: These ratings are based on 90°C conductor temperature and standard ambient conditions. Always consult with a licensed electrical engineer and reference NEC Article 310.15 for project-specific calculations.
URD stands for Underground Residential Distribution. It is a category of electrical cable specifically engineered for direct burial in the earth. Unlike standard indoor wire, URD is built with rugged XLPE (Cross-Linked Polyethylene) insulation that is chemically designed to resist moisture, soil acids, and mechanical pressure without needing a protective outer jacket or conduit.
Yes. 350 MCM Quadruplex is a Type USE-2 cable specifically designed for direct burial. The XLPE insulation is formulated to resist moisture, soil chemicals, and mechanical stress, though conduit is often preferred at this size for added physical protection and ease of future maintenance.
Yes. While designed for underground use, the insulation is UV-rated. This is vital for the portions of the cable that emerge from the ground to enter a meter socket or transformer cabinet.
Aluminum URD is the industry standard for underground utility feeds because it is significantly more cost-effective and lighter than copper. At the 350 MCM size, aluminum provides the necessary ampacity for large residential and commercial feeds at a fraction of the cost of copper.
The 4/0 AWG reduced neutral allows the cable to be more flexible and cost-effective than a full 350 MCM neutral while still providing enough capacity for the unbalanced loads typical of large three-phase commercial and residential services.
The weight of this 350-350-350-4/0 Cable is 1.598 lbs/ft.
(833) 268-8644
Get this thing filled up so you can help Wire America!