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Posted to rec.woodworking
Roger Bigras
 
Posts: n/a
Default How do I know if I need a new switch for 240v?

Toller wrote:
The Switch (A regular switch that is) is ok if you flip it one way and
the motor starts and if you flip it the other way the motor stops.


False. The switch is ok if that occurs, *and* the switch is rated for both
the
voltage and the amperage that it's switching. Better still if the switch
disconnects all of the hot conductors going to the motor.



Well, that's false also. A switch for a motor has to be rated for the hp of
the motor. You can be okay on voltage and amperage and still fry the
switch. It happened on my used table saw; the switch fused closed.


Humm, something not adding up, Voltage and amperage are the *basic*
elements of electric horsepower. Having the proper Voltage and amperage
rating on a switch would have the proper horsepower rating. Possibly
your used table saw motor may of been defective and drawing a bit more
than it was suppose to. or the V A calculations were wrong. A breaker or
fused should of tripped.

But then again as the tread goes on, someone mentioned something about a
magnetic switch, that is probably the better answer.