4 Gauge AWG 500 Ft Black Flexible Pure Copper Welding Cable - Heavy

Our review of the TEMCo 4 gauge welding cable finds it best suited for DIY electricians, solar installers, and vehicle enthusiasts who need a long, flexible battery or welding lead. The single biggest reason to buy is the combination of annealed oxygen free copper and a rugged EPDM jacket that keeps the cable highly flexible while resisting oil, grease and abrasion, making it easy to route in tight engine bays or solar arrays.

Key Features

• 150 Max Amps: Provides reliable current capacity for short runs up to 50 ft, making it suitable for many battery and inverter tasks.
• Rated to 600 volts: Allows use in a variety of DC systems including solar, RV and battery banks where higher voltage tolerance is useful.
• Wide temperature range: Operates from -58F to +221F so it holds up in cold storage and hot engine compartments without hardening.
• Annealed 30 gauge OFC conductor: The oxygen free copper stranding improves conductivity and flexibility compared with standard tinned or lower grade copper.
• Rugged EPDM jacket: The jacket resists cuts, tears, water, oil and grease so it remains durable in workshop and vehicle environments.
• Highly flexible construction: 364/30 conductor stranding and a nominal OD of 0.331 in makes the cable easy to bend and route in confined spaces.

Who It's For

The cable is ideal for hobbyists and professionals who need a versatile DC cable for welding leads, battery cables, car audio, winch power leads, and solar or RV systems. Its flexibility and abrasion resistance make it practical for routing through cramped engine bays and camper conversions.

Those who need long high-current welding runs that exceed safe ampacity at distance or require specialized insulation types for extreme chemical exposure should consider a different, application-specific cable. Also, if you require color-coded multi-conductor wiring rather than single heavy gauge cable, this single-conductor product is not the right choice.

Pros & Cons

Pros

• Excellent flexibility that customers repeatedly note makes installation easier in tight spaces.
• Durable EPDM jacket resists oil, grease, abrasion and flame for workshop and vehicle use.
• Pure annealed OFC copper delivers good conductivity and long-term durability for battery and audio applications.

Cons

• 150 amp recommendation applies for runs up to about 50 ft, so longer runs will see reduced effective current capacity.
• Single-conductor cable requires separate conduit or organization when used in complex multi-wire installations.

Specifications

Our Verdict

The TEMCo 4 gauge 500 ft welding cable is a practical, value-oriented choice for anyone needing a long, flexible pure copper lead for battery, solar or light welding work. It balances flexibility, durability and conductivity well, making it a sensible buy for installers and DIYers who want a robust single-conductor cable at a reasonable price.

Frequently Asked Questions

Can this cable be used for battery connections?
Yes. The pure annealed copper conductor and EPDM jacket make it suitable for battery and starter cable use in cars, trucks, RVs and battery banks.

How far can I run this cable at 150 amps?
150 amp capacity is realistic for runs up to about 50 ft; longer runs will reduce effective ampacity due to voltage drop.

Is the jacket resistant to engine bay conditions?
Yes. The EPDM jacket resists oil, grease, abrasion and high temperatures within the specified range, so it performs well in engine compartments.