Heavy-Duty 500A Copper Tong Earth Clamp

Don't Let a Bad Ground Ruin Your Weld

Every experienced welder knows that a sputtering arc, hard starts, or wandering puddles can often be traced back to one thing: a bad ground. The LGC-500 Copper Ground Clamp is built to solve these problems. Designed for serious fabricators running up to 500 Amps, this heavy-duty work clamp ensures that your welding circuit is solid, so you can focus on laying down perfect beads without fighting your equipment.

The "Tong Style" or alligator design is the industry standard for a reason—it's quick, effective, and reliable. The LGC-500 features a heavy-duty spring that clamps down with authority. This isn't a flimsy clip that slides off when you drag the cable; it bites into the metal and stays put. The wide jaw opening allows you to clamp onto a variety of shapes, from plate edges to pipe sections and structural beams.

Why Copper Matters

When you are pushing 300, 400, or 500 amps, resistance is your enemy. Steel clamps are cheaper, but they resist current flow, getting hot and robbing your arc of voltage. The LGC-500 uses copper alloy jaws to provide a low-resistance path for the welding current. This translates to:

• Smoother Arcs: Consistent voltage means a buttery smooth arc that is easier to control.
• Cooler Operation: The clamp stays cooler, preventing the spring from annealing and losing tension over time.
• Better Starts: Instant arc ignition because the current flows immediately without fighting through a high-resistance contact.

This clamp is an essential upgrade for any MIG, TIG, or Stick welder operating in the medium-to-heavy amperage range. It is designed to be easily attached to your existing ground lead using a standard cable lug. Stop troubleshooting your machine settings and start by checking your ground—if it's not an LGC-500, it might be time for an upgrade.