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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 : CPC350
SKU : CPC350-250
This 350 MCM HMWPE Cathodic Protection Cable is a specialized single-conductor wire engineered for impressed current cathodic protection systems. Designed for direct burial or submersion, it provides the vital connection for protecting buried pipelines, storage tanks, and marine structures from the devastating effects of electrolytic corrosion.
Cathodic protection environments are uniquely hostile, often containing high concentrations of salts, moisture, and corrosive gases. The High Molecular Weight Polyethylene (HMWPE) insulation is specifically designed as a rugged jacket that provides excellent dielectric strength and extreme mechanical toughness compared to standard insulation materials.
Corrosion Resistance: The HMWPE jacket acts as a chemical shield against chlorine, hydrogen, and other corrosive gases produced during the cathodic protection process.
Direct Burial & Submersion: Rated for direct burial in soil and for use in fresh, brackish, or salt water.
Rugged Durability: Offers high resistance to abrasion, crushing, and environmental stress cracking, ensuring the conductor remains protected during site backfilling.
High-Purity Copper: Constructed with soft-drawn, stranded bare copper to ensure maximum conductivity for efficient current flow to anode beds.
Conductor Size: 350 MCM (kcmil)
Conductor Material: Stranded Bare Copper
Insulation Material: High Molecular Weight Polyethylene (HMWPE)
Voltage Rating: 600V
Temperature Rating: 75°C (167°F)
Amp Rating: 285 Amps (@ 75°C)
Standard Color: Black (UV Resistant)
Approvals: ASTM D-1248, ICEA S-95-658
Pipeline Infrastructure: Ideal for anode lead and feeder cables for buried oil, gas, and water transmission lines.
Storage Tank Protection: Used to connect rectifiers to sacrificial or impressed current anodes for underground storage tanks (USTs).
Marine & Offshore: Protects steel pilings, bulkheads, and underwater structures in saltwater environments.
Ground Beds: Critical for wiring within deep-well or surface-ground-bed installations.
Technical Note: To maintain the integrity of the cathodic protection system, ensure the insulation is free of nicks or scratches before burial. In applications where chlorine gas or hydrocarbons are present in high concentrations, a dual-insulated construction (HALAR/HMWPE) may be required for enhanced chemical protection.
| Wire Size (AWG/MCM) | 350 MCM |
| Conductor Material | Copper |
| Conductor Type | Stranded |
| Strand Count | 37 |
| Outer Diameter (OD) (in/mm) | 0.99 in. / 25.14 mm |
| Conductor Count | 1 |
| Shield | Unshielded |
| Insulation Type | (HMWPE) High Molecular Weight Polyethylene |
| Voltage Rating | 600V |
| Ampacity Rating | 285 |
| Direct Burial Rating | Yes |
| Submersible | Yes |
| Flexibility Rating | Very Low |
| Sunlight Resistance Rating | Yes |
| Temperature Rating | 75°C |
| Standards | ASTM B-8 Stranded Copper Conductors ASTM-D-1248 ICEA S-61-402 NEMA WC-5 Type I Class C Category 5 Grades E-5 and J-I HMWP |
| Miscellaneous Information | The data shown is approximate and subject to standard industry and manufacturer tolerances |
| Common Uses |
|
| Weight per Foot | 1.26 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 : CPC350
SKU : CPC350-250
Parent SKU : CPC350
SKU : CPC350-250
This 350 MCM HMWPE Cathodic Protection Cable is a specialized single-conductor wire engineered for impressed current cathodic protection systems. Designed for direct burial or submersion, it provides the vital connection for protecting buried pipelines, storage tanks, and marine structures from the devastating effects of electrolytic corrosion.
Cathodic protection environments are uniquely hostile, often containing high concentrations of salts, moisture, and corrosive gases. The High Molecular Weight Polyethylene (HMWPE) insulation is specifically designed as a rugged jacket that provides excellent dielectric strength and extreme mechanical toughness compared to standard insulation materials.
Corrosion Resistance: The HMWPE jacket acts as a chemical shield against chlorine, hydrogen, and other corrosive gases produced during the cathodic protection process.
Direct Burial & Submersion: Rated for direct burial in soil and for use in fresh, brackish, or salt water.
Rugged Durability: Offers high resistance to abrasion, crushing, and environmental stress cracking, ensuring the conductor remains protected during site backfilling.
High-Purity Copper: Constructed with soft-drawn, stranded bare copper to ensure maximum conductivity for efficient current flow to anode beds.
Conductor Size: 350 MCM (kcmil)
Conductor Material: Stranded Bare Copper
Insulation Material: High Molecular Weight Polyethylene (HMWPE)
Voltage Rating: 600V
Temperature Rating: 75°C (167°F)
Amp Rating: 285 Amps (@ 75°C)
Standard Color: Black (UV Resistant)
Approvals: ASTM D-1248, ICEA S-95-658
Pipeline Infrastructure: Ideal for anode lead and feeder cables for buried oil, gas, and water transmission lines.
Storage Tank Protection: Used to connect rectifiers to sacrificial or impressed current anodes for underground storage tanks (USTs).
Marine & Offshore: Protects steel pilings, bulkheads, and underwater structures in saltwater environments.
Ground Beds: Critical for wiring within deep-well or surface-ground-bed installations.
Technical Note: To maintain the integrity of the cathodic protection system, ensure the insulation is free of nicks or scratches before burial. In applications where chlorine gas or hydrocarbons are present in high concentrations, a dual-insulated construction (HALAR/HMWPE) may be required for enhanced chemical protection.
| Wire Size (AWG/MCM) | 350 MCM |
| Conductor Material | Copper |
| Conductor Type | Stranded |
| Strand Count | 37 |
| Outer Diameter (OD) (in/mm) | 0.99 in. / 25.14 mm |
| Conductor Count | 1 |
| Shield | Unshielded |
| Insulation Type | (HMWPE) High Molecular Weight Polyethylene |
| Voltage Rating | 600V |
| Ampacity Rating | 285 |
| Direct Burial Rating | Yes |
| Submersible | Yes |
| Flexibility Rating | Very Low |
| Sunlight Resistance Rating | Yes |
| Temperature Rating | 75°C |
| Standards | ASTM B-8 Stranded Copper Conductors ASTM-D-1248 ICEA S-61-402 NEMA WC-5 Type I Class C Category 5 Grades E-5 and J-I HMWP |
| Miscellaneous Information | The data shown is approximate and subject to standard industry and manufacturer tolerances |
| Common Uses |
|
| Weight per Foot | 1.26 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:
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350 MCM is an industrial-grade Main Positive Feeder or Negative Return Header. It is the "Super-Artery" of an Impressed Current (ICCP) system. You will typically find 350 MCM specified for protecting massive assets like power plant intake structures, wastewater treatment plants, and interstate pipeline headers where the current load is exceptionally high.
The shift to 350 MCM is driven by the need for extreme electrical stability. In massive systems, the total amperage required to reach a protective potential can be very high. 350 MCM provides a massive copper cross-section that virtually eliminates "Line Loss." This ensures that even at the furthest point from the rectifier, your structure maintains the required -850mV potential.
TIP: Cathodic Protection systems are highly site-specific. Before selecting your cable gauge, we strongly recommend consulting with a NACE-certified Corrosion Engineer or a licensed CP installer to verify your voltage drop calculations and soil resistivity requirements.
Yes. Our High Molecular Weight Polyethylene (HMWPE) insulation is designed to be as rugged as the conductor it protects. It is exceptionally resistant to "environmental stress cracking" and the chemical byproducts (chlorine and hydrogen gases) common at high-output anode groundbeds. This allows the cable to be directly buried or submerged for a 40+ year service life.
Absolutely. 350 MCM is often used for the main grounding and protection grid of offshore platforms, piers, and heavy-duty wharves. The thickness of the HMWPE jacket provides a high level of abrasion resistance, which is critical in tidal zones where shifting sands and debris can impact the cable.
While 350 MCM has an ampacity rating of approximately 285 Amps @ 75°C in typical burial, it is almost never pushed to that limit. Engineers use 350 MCM for maximum efficiency. By running a lower current through a larger conductor, you minimize heat and voltage drop, which protects the rectifier from overworking and prevents long-term insulation degradation.
NOTE: Cathodic Protection systems are highly site-specific. Before selecting your cable gauge, we strongly recommend consulting with a NACE-certified Corrosion Engineer or a licensed CP installer to verify your voltage drop calculations and soil resistivity requirements.
Cathodic Protection cable is a specialized electrical conductor used to prevent corrosion in buried or submerged metallic structures, such as pipelines, storage tanks, and pier pilings. It connects the structure to an anode system, carrying the direct current (DC) necessary to neutralize the electrochemical process that causes rust and decay.
HMWPE stands for High Molecular Weight Polyethylene. It is the "outer shell" of most CP cables. It is used because it is incredibly tough, moisture-resistant, and has high dielectric strength, allowing the cable to be buried directly in a variety of soil types without a conduit.
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