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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 : CPC4
SKU : CPC4-250
This #4 AWG HMWPE Cathodic Protection Cable is a high-durability, single-conductor wire engineered specifically for impressed current cathodic protection (ICCP) systems. Designed for direct burial or submersion, it provides the essential electrical path to prevent corrosion on critical infrastructure such as pipelines, storage tanks, and marine pilings.
Cathodic protection environments are notoriously harsh due to the presence of corrosive gases, moisture, and varying soil chemistry. High Molecular Weight Polyethylene (HMWPE) is the industry-standard insulation for these applications because it offers a unique combination of chemical stability and mechanical toughness that standard power cables lack.
Chemical & Moisture Barrier: The HMWPE jacket is specifically designed to resist degradation from chlorine, hydrogen, and other gases produced during the electrolytic process at the anode bed.
Rugged Mechanical Protection: Features elite resistance to abrasion, crushing, and environmental stress cracking, ensuring the cable remains intact during backfilling and throughout the life of the system.
Direct Burial & Submerged Rating: Fully rated for direct burial in soil and for use in fresh, brackish, or salt water.
High Conductivity: Manufactured with soft-drawn, stranded bare copper to ensure efficient current distribution and reliable protection for metallic structures.
Conductor Size: #4 AWG
Conductor Material: Stranded Bare Copper
Insulation Material: High Molecular Weight Polyethylene (HMWPE)
Voltage Rating: 600V
Temperature Rating: 75°C (167°F)
Amp Rating: 85 Amps (@ 75°C)
Standard Color: Black (UV Stabilized)
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 and above-ground tanks.
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 where chemical resistance is paramount.
Technical Note: Maintaining the integrity of the insulation is critical; any breach in the HMWPE jacket allows the copper conductor to become an accidental anode, leading to rapid wire corrosion and system failure. For environments with high concentrations of chlorine gas or hydrocarbons, consider a dual-insulated construction (HALAR/HMWPE).
| Wire Size (AWG/MCM) | 4 AWG |
| Conductor Material | Copper |
| Conductor Type | Stranded |
| Strand Count | 7 |
| Outer Diameter (OD) (in/mm) | 0.46 in. / 11.68 mm |
| Conductor Count | 1 |
| Shield | Unshielded |
| Insulation Type | (HMWPE) High Molecular Weight Polyethylene |
| Voltage Rating | 600V |
| Ampacity Rating | 85 |
| Direct Burial Rating | Yes |
| Submersible | Yes |
| Flexibility Rating | Medium |
| 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 | 0.185 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 : CPC4
SKU : CPC4-250
Parent SKU : CPC4
SKU : CPC4-250
This #4 AWG HMWPE Cathodic Protection Cable is a high-durability, single-conductor wire engineered specifically for impressed current cathodic protection (ICCP) systems. Designed for direct burial or submersion, it provides the essential electrical path to prevent corrosion on critical infrastructure such as pipelines, storage tanks, and marine pilings.
Cathodic protection environments are notoriously harsh due to the presence of corrosive gases, moisture, and varying soil chemistry. High Molecular Weight Polyethylene (HMWPE) is the industry-standard insulation for these applications because it offers a unique combination of chemical stability and mechanical toughness that standard power cables lack.
Chemical & Moisture Barrier: The HMWPE jacket is specifically designed to resist degradation from chlorine, hydrogen, and other gases produced during the electrolytic process at the anode bed.
Rugged Mechanical Protection: Features elite resistance to abrasion, crushing, and environmental stress cracking, ensuring the cable remains intact during backfilling and throughout the life of the system.
Direct Burial & Submerged Rating: Fully rated for direct burial in soil and for use in fresh, brackish, or salt water.
High Conductivity: Manufactured with soft-drawn, stranded bare copper to ensure efficient current distribution and reliable protection for metallic structures.
Conductor Size: #4 AWG
Conductor Material: Stranded Bare Copper
Insulation Material: High Molecular Weight Polyethylene (HMWPE)
Voltage Rating: 600V
Temperature Rating: 75°C (167°F)
Amp Rating: 85 Amps (@ 75°C)
Standard Color: Black (UV Stabilized)
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 and above-ground tanks.
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 where chemical resistance is paramount.
Technical Note: Maintaining the integrity of the insulation is critical; any breach in the HMWPE jacket allows the copper conductor to become an accidental anode, leading to rapid wire corrosion and system failure. For environments with high concentrations of chlorine gas or hydrocarbons, consider a dual-insulated construction (HALAR/HMWPE).
| Wire Size (AWG/MCM) | 4 AWG |
| Conductor Material | Copper |
| Conductor Type | Stranded |
| Strand Count | 7 |
| Outer Diameter (OD) (in/mm) | 0.46 in. / 11.68 mm |
| Conductor Count | 1 |
| Shield | Unshielded |
| Insulation Type | (HMWPE) High Molecular Weight Polyethylene |
| Voltage Rating | 600V |
| Ampacity Rating | 85 |
| Direct Burial Rating | Yes |
| Submersible | Yes |
| Flexibility Rating | Medium |
| 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 | 0.185 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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#4 AWG is a heavy-duty cable typically used as a Main Feeder or Trunk Line. In smaller systems, it connects the rectifier directly to the anode groundbed (Positive) or the protected structure (Negative). Because it has a much larger copper cross-section than #8 or #10, it is designed to carry the primary current load for the entire system without significant power loss.
The jump to #4 AWG is almost always a solution for Voltage Drop. If your rectifier is located a long distance from your pipeline or tank, a thinner wire will "lose" too much voltage along the way. #4 AWG offers significantly lower resistance, ensuring that the "Driving Voltage" remains high enough to achieve the required protection levels at the structure.
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.
Yes. The High Molecular Weight Polyethylene (HMWPE) jacket on our #4 cable is thick and exceptionally rugged. It is engineered to withstand the mechanical stresses of direct burial, including abrasion from rocky soil and the chemical "attack" from the gases (chlorine and hydrogen) naturally produced by the CP process.
Absolutely. It is a standard choice for protecting submerged docks, piers, and boat lifts. The non-porous HMWPE insulation prevents "osmotic blistering," which is a common failure point where saltwater seeps through standard wire insulation and corrodes the copper from the inside out.
In a typical underground environment, #4 AWG is rated for approximately 85 Amps @ 75°C. However, in cathodic protection design, installers rarely operate at these limits. They use #4 AWG to keep the resistance low—this ensures the system stays energy-efficient and the cable remains "cool," extending the life of the insulation to 30+ years.
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.
While #4 HMWPE is Direct Burial Rated, many contractors choose to use conduit for the "riser" portion where the cable exits the ground to enter the rectifier. This provides extra protection against lawnmowers, weed whackers, or accidental vehicle impact. For the underground run itself, no conduit is required.
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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