It is common for motors to have "inrush current" (startup amperages) in the
area of 6 times the rated amperage. Large pumps will likely have to have a
relay to deal with this. It is also likely a cheaper way to meet the
required amperage for the large pumps.

"Soji John" wrote in message
...
Jim Reynolds wrote:

I am going to build a sump and would like to put in a float switch. My
question is: Do most people use a relay with the
float switch to control the pump or is there a 110v float switch available
?

Thanks,
jmr




Don't just check voltage. Be sure to check the wattage of the switch and
that it matches up with the pump you are attaching. I use the following
to drive a small powerhead. I replace the small metal piece with a tie
off and it works fine.
http://www.floatswitches.net/floatswitch.html

hth,

-soji