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power switches and limit switches in ontario canada

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  • power switches and limit switches in ontario canada

    Where can I get something like this http://busybeetools.ca/cgi-bin/picture10?NTITEM=B2561 in ontario canada (well this is one store, but I'm looking for something with three buttons for forward, stop, and reverse). I'm also looking for a limit switch that is capable of controlling (opening a circuit) on a 110V 15A motor - this way I can avoid having to construct a smaller circuit to control a relay.

  • #2
    Check Princess Auto, they have stuff that may work for you

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    • #3
      Other than the normal Electrical Wholesalers which would be expensive, the only low cost supplier is Princess Auto.

      This Rotary setup might work for your application.

      http://www.princessauto.com/farm/ele...-select-switch
      http://www.princessauto.com/farm/ele...h-mounting-box

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      • #4
        Originally posted by rancherbill
        Other than the normal Electrical Wholesalers which would be expensive, the only low cost supplier is Princess Auto.

        This Rotary setup might work for your application.

        http://www.princessauto.com/farm/ele...-select-switch
        http://www.princessauto.com/farm/ele...h-mounting-box
        It will only do 6A at 125V, don't motors this big (3/4) usually spike over 10A on startup?

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        • #5
          Why not just use the limit switches to control a relay which controls power to the motors. Do it at line voltage so you don't have to mess around with a dc power supply or us 24VAC control voltage to reduce the 115 floating around, if you don't need to get it inspected that hardly matters.
          Dave

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          • #6
            I doubt if you will find inexpensive high current limit switches, so the question becomes whether it is worth the savings to use relays and micro-switches from Radio Shack. Those high current switches are certainly available. There should be a couple on a commercial overhead door operator. What do the 3/4 HP door openers that Sears sells use?
            Duffy, Gatineau, Quebec

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            • #7
              The starting current spike is not going to hurt the switch. The switch need only be rated to handle the motor full load current + a factor of safety, which if memory serves me correctly is only +10%.

              So is the motor draws 3 full load amps, you would need a switch rated for 3.3A. Same goes for the wiring, it only needs to be sized for the full load amps, not the spike.

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