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I had a circuit that I wanted to turn on when I connected a plug(9 pin) 3 pins consumed by POT and 2 For a momentary switch. 4 pins remain available.

Thoughts was to use 2 pin connected together to act similar to a switch. When connected they would connect power to AC/DC converter, when plug disconnected no power to ac/dc. Mains power can either be 110 or 220 VAC.

Question is do both 220 Load legs need to be disconnected or only 1.

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  • \$\begingroup\$ Basically should a 220VAC switch in US be dual pole or single pole \$\endgroup\$ – user10434631 Nov 26 '19 at 0:11
  • \$\begingroup\$ The construction and plating of connector contacts and switch contacts are very different, because they do very different things. "Hot-plugging" AC through a connector will quickly degrade the contacts until they no longer conduct, or conduct poorly and overheat. If your power supply has a low-power output-enable function, better to switch that with the connector. \$\endgroup\$ – AnalogKid Nov 26 '19 at 0:47
  • \$\begingroup\$ Thanks that will help \$\endgroup\$ – user10434631 Nov 26 '19 at 3:38
  • \$\begingroup\$ Usually, for safety, both poles of the line voltage are switched. \$\endgroup\$ – user69795 Nov 26 '19 at 6:32
  • \$\begingroup\$ What about low power dc 3W \$\endgroup\$ – user10434631 Nov 26 '19 at 9:33

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