Extension cord sizing for a 15 A table saw

Read the plate on your saw. Most portable contractor and jobsite saws land at 13–15 A on 120 V. That number is running draw in a cut, not the first instant the arbor comes up. A table saw has more rotating mass than a circular saw, so start surge is uglier. A cord already sagging at nameplate sags more on spin-up. The blade comes up slow, the motor heats, and people blame the saw.

Cabinet and many hybrid saws are a different product: 240 V, often 20 A or more, and they want a dedicated circuit — not a 15 A outdoor reel. If the nameplate is 240 V, stop shopping extension cords and wire the receptacle. This page is the 15 A, 120 V shop load.

Shop picks for a 15 A table saw

Same copper planning math as the master chart — NEC Chapter 9 Table 8 resistances on 120 V, not a lab score for a named reel. At 25 and 50 feet, 12 AWG is the pick. A table saw often lives on a 50-foot cord because the outlet is on the wall and the outfeed is in the aisle. That is a 12 AWG job. At 100 feet, 10 AWG is the honest 15 A answer — see the 100-foot guide.

50 ft 12 AWG SJTW is the usual shop buy.

12 AWG vs 10 AWG

14 AWG is close on paper at 25 feet and already the wrong aisle at 50 for a motor that runs a long rip. 12 AWG is the default shop cord: one reel that can feed the saw without being the weak link. Step up to 10 AWG when the run is a full 100 feet, when lights already dip on a 12 AWG start, or when you are treating the cord as permanent shop wiring instead of a temporary reach.

Miter saws in the same 15 A class follow the same gauge × length table. The table saw is just the one people leave parked on a long cord all afternoon.

Circuit and jacket, not just AWG

• A 15 A saw wants a 15 A or 20 A circuit that is not already running a space heater or a dust collector. Two 15 A motors on one 15 A breaker is how shops invent trips.
• GFCI protection in garages is normal. A thicker cord does not fix a tired GFCI.
• Match the plug to the receptacle. Filing a 20 A blade to fit 15 A is how people invent a fire.
• Driveway and open-door shop work needs an outdoor-rated jacket in the gauge you already chose — SJTW, not a thinner indoor cord with a weather story on the hang tag.

Signs the cord is too thin

• The blade takes a long time to come up to speed, then sags again in a normal rip.
• Lights on the same circuit dip when the saw starts.
• The cord jacket is warm along the run, not just at a loose plug.
• The saw smells hot after a short session that used to be easy on a short factory cord.

Those signs can also mean a dull blade, a misaligned fence, or a binding cut. Check the saw. Then check gauge and length. Unspool the reel — a coiled 12 AWG cord under a 15 A load is a heat problem of its own.

What “best” does not mean here

We are not ranking brands and we do not have a 9.4. A 12 AWG, 50-foot, SJTW cord with intact 15 A ends from a known listing is the product for a typical contractor saw. Brand paint, lighted ends, and a retractable reel are convenience. They are not a substitute for copper, and a 16 AWG “heavy duty” outdoor reel is still 16 AWG.