Reddit reviews Ace Remote Switch Extension Cord (1PC-002-015FWH)

You could use something like this

That switch is for low voltage, but you have the right idea. An an extension cord would be allowed, as this is not a permanent installation.

Something like these may interest you:

https://www.amazon.com/Remote-Switch-Extension-Cord-1PC-002-015FWH/dp/B000GAS3HG

https://www.ebay.com/itm/Foot-Switch-with-3-Outlet-9-foot-Power-Cord-Black-/302450857422

How about get something like this, cut off the switch portion, wire it into your project with a strain relief bushing on your enclosure?

how about this

https://www.amazon.com/Remote-Switch-Extension-Cord-1PC-002-015FWH/dp/B000GAS3HG

It’s an older remote switch. The cord coming out of it should have a male/female plug left on table or wall to turn on lamps with hard to reach switches (any lower power device would work also). More modern example:

https://www.amazon.com/Remote-Switch-Extension-Cord-1PC-002-015FWH/dp/B000GAS3HG

I put an external switch on my aquarium stand that controls the power to my wavemakers, return pump and aqua lifter. I flip the switch off for feeding. When I flip it back on, the return pump fills up the HOB overflow, and the aqua lifter restarts the siphon on the overflow box. I also added a siphon break on my in-tank return about 1/4" below the surface of the water. I get a couple of gallons at the most that siphon back into the sump when I kill the return pump.

I am using something similar to this:

https://www.amazon.com/Ace-Remote-Switch-Extension-Cord/dp/B000GAS3HG