What Size Generator for Table Saw (10")? (Startup vs. Running Watts)

A 10-inch contractor table saw draws about 1,800W at idle (no-load running) and its cold startup LRA surge hits roughly 4,000–4,500W for a fraction of a second. That's your baseline — and most generator sizing guides stop there. But jobsite conditions create a second, more dangerous scenario.

When a table saw blade bites into dense hardwood — especially green lumber, thick oak, or hardwood with hidden knots — the motor can momentarily stall under torque load. This mid-cut stall creates a current spike that can equal or exceed the cold-start LRA, sometimes reaching 4,500–5,500W, but sustained for longer than the initial startup because the motor is fighting a mechanical resistance rather than overcoming inertia from rest.

On a generator, this manifests as a visible voltage sag, a brief RPM drop heard as the generator 'bogs,' and in the worst case, a sustained overload that trips the generator's breaker mid-cut. A mid-cut power loss is a jobsite safety hazard — the blade may bind in the kerf and kick back. Size your generator with at least 1,000W of headroom above the stated starting watts, use a generator with good voltage regulation (AVR), and always complete cuts at full feed rate rather than slow-feeding through resistance.

For jobsite use, a dual-fuel generator is invaluable — propane burns cleaner in cold weather and avoids the stale-gas problems that plague infrequently used generators. Keep the generator at least 20 feet from the work area to keep sawdust out of the air intake.