The Right Cord Gauge, Every Run.

Pick your IMER tool and how far it sits from the outlet. Get the minimum extension-cord gauge to keep the motor fed with clean voltage — full power, no overheating.

Cord Gauge Calculator

◧ At the outlet
200 ft away ▸

Voltage drop

Thin wire over distance bleeds off volts as heat. A motor starved of voltage can't make rated torque, so it bogs down and pulls even more current.

Motor life

Low voltage means high amperage, and high amperage means heat. Sustained undervoltage cooks windings — the fastest way to burn up a good mixer or saw.

Heat & safety

An undersized cord heats along its whole length — a fire and trip hazard. The right gauge keeps the cord cool, the breaker happy, and the tool performing.

The Sizing Chart

Read down to your cord length, across to your tool's amp draw — the colored block is your minimum gauge. This is the reference the calculator above runs on.

Non-Critical 10% General mixing, sawing, and pumping where a little voltage drop is fine. The same gauge reaches about 3× farther than the critical column. Critical 3% Long-duration motor loads and runs where you want to protect the equipment — the motor-friendly target the calculator uses by default.
Planning aid only. Operating current uses published catalog figures where given (amps listed in the spec line) and is otherwise estimated from rated horsepower and voltage; the calculator rounds up to the next amp column for margin. Three-phase options are included, but this is a single-phase voltage-drop chart — three-phase readings are conservative; size three-phase feeders to the NEC. Always confirm against the tool's manual and nameplate, use a GFCI, fully uncoil cords in use, and when in doubt size up. Access equipment, trackers, gas/diesel-only units (incl. Booster 20, Prestige 300, Gerris 800, Terra Cut 500), and the Mix 200 / Spin 15 / Spin 30 are not listed.