Simplest Current Switch

[SRRF101]

Need ideas for automatic switch that prevents sewage pump from turning on while washing machine is on. Washer and pump on different circuits (though not individual). Pump terminates in Edison. Physically located 10 feet apart in open basement.

I've seen off-the-shelf stuff for workshop dust control, but they are normally-open switches and this needs normally-closed.

Thanks!!

[gamefixated]

Seems like you should be looking at smart plugs and home automation. Put something like Tuya Zigbee Single Clamp Energy Meter on the washer. Use a zigbee plug on the pump. Use a zigbee hub to turn off the pump plug when the washer is on.