Plug to waterproof Christmas lights and multi-prong extension cords
thingiverse
Here's a cool item for waterproofing outdoor Christmas lights and multi-prong outdoor extension cords. The third prong can be snapped off for 2 prong connections. They're designed to work in conjunction with Rain Block Weatherproof Gaskets. I used these last year on Christmas lights, and they worked REALLY well - no tripped GFCIs! You can get the gaskets from Rainblock's website or at Amazon: the Rain Block Weatherproof Extension Cord Gasket pack is available on their site, www.rainblock.net, and also on Amazon at https://www.amazon.com/Weatherproof-Extension-Cord-Gasket-pack/dp/B01N03R04R. They're like child-proof plugs but with a handle that makes them easier to remove.
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