Don’t let a thin cable kill your machine — how to pick the right power cable
Maintenance
The number one reason big machines burn out early isn’t the machine, it’s the cable feeding it.
Every professional machine: coring drill, welder, cutting saw, pressure washer — pulls a specific amount of current when it’s working under load. If the cable feeding it is too thin, three bad things happen: the cable heats up (fire risk), voltage drops before it reaches the machine (loss of power), and the motor works harder than it should (shortened lifespan).
A good rule of thumb we tell every customer: check the amp rating on the machine’s plate, then use a cable one size thicker than the minimum. That extra margin costs a few dollars and protects a machine that cost hundreds or thousands.
Rough guide for the machines we sell most:
- Small tools (drills, grinders under 1,500 W): 2.5 mm² cable
- Medium tools (coring machines, mid-range welders): 4 mm² cable
- Heavy machines (large welders, big coring rigs, pressure washer pumps): 6 mm² cable or more
Also important: the longer the extension, the thicker the cable needs to be. A 4 mm² cable that’s fine at 10 meters can drop too much voltage at 50 meters. If you’re working far from the outlet, size up.
If you’re not sure what’s right for a specific machine, message us on WhatsApp — we’ll check the machine’s specs and tell you exactly what cable to use.