This is from a google search.

Marv

The general rule of thumb for picking wiring size is
· 14-gauge wire is rated for currents up to 15 amps. Circuits in many
homes, especially cost-conscious tract homes, use 14-gauge wiring in most of
the house except the kitchen; even in the garage. This is a distinct
disadvantage nowadays due to hair dryers in bathrooms, computers and other
equipment in bedroom/home offices, etc. Avoid 14-gauge wiring in any new
home if you are building.

· 12-gauge wire for currents up to 20 amps. But a 20-amp breaker must
not be loaded above 16 amps of continuous current draw. This is adequate for
most home shops, provided your bigger tools operate on 240-volt power, and
you don't have multiple tools going at the same time.

· 10-gauge wire for up to 30 amps, or 40 amps if you are running
intermittently loaded motors such as on a table saw or jointer that is not
being used for big production jobs or jobs where you are doing a lot of
continuous cutting. With intermittent loads, you can use 40-amp breakers,
because a 40-amp breaker should not be loaded at more than 32 amps
continuous. Just be aware that you will have more heating in the wire, so it
be as open to ventilation as possible. It shouldn't be buried under the
insulation in an attic, for example, between the breaker panel and the plug
in the wall. 10-gauge wire is rarely used on 120-volt circuits.

"fireant" wrote in message
...
Want to replace current 10' cord with 25' cord.
Is 14-3 large enough?

Saw is 3 HP 220V. TIA, F