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Message: <blockquote data-quote="qtipextra" data-source="post: 1653582" data-attributes="member: 555270">You would need a Single Pole Double Throw switch with a rating of at least 50 volts ac at 50 amps. I'd go higher if possible on the amperage. A basic rule of thumbs is that for most switch ratings, if you divide the voltage by 2, you can multiply the amperage by 2. Example: A switch is rated at 30 amps at 240vac. Now, if you have less voltage, like down to 120 vac, it should be good up to 60 amps. Thats not always the case though.You can find high amperage SPDT switches around, but they are expensive for a switch.<a href="http://www.digikey.com/scripts/dksearch/dksus.dll?KeywordSearch" target="_blank">Heres</a> one at Digikey.com. About 40 bucks tho.30 Amps at 240 or 120 v ac. Maybe contact them to see current rating at 50 volts.Just trying to help, that at least gives you a start.</blockquote>

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