5 Things to Know About Extension Cords for High-Power Tools

Shorter and thicker is always better For high-power tools, a short cord with lower gauge (thicker wire) outperforms a longer cord with higher gauge. This is physics, not opinion.

Voltage drop is the problem Longer cords have more resistance, and higher gauge (thinner wire) adds even more. Your tool gets less voltage and draws more current, which heats the cord and can damage the motor.

A bad example: 100-foot 14-gauge cord for a 15-amp saw This combination makes the saw run sluggish, trip breakers, or burn out. A 25-foot 12-gauge cord runs it like it is plugged into the wall.

The exception is a thick enough long cord If the long cord is still thick enough (say, 10-gauge) for the tool’s amp draw and distance, it can work. But shorter still delivers slightly better voltage.

Never skimp on cords for heavy tools Always pick the shorter, lower-gauge cord for saws, welders, or air compressors. Your tools and safety depend on it.