Electrical – Best solution for outdoor outlet with permanent connection

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I have a circular junction box on my deck (outside) where I can presumably attach an outlet, and it is connected to a switch. I have string lights I'd like to permanently connect to to this outlet (they plug in normally).

What is the best weather-proof solution so that I can keep the lights plugged in, but have the outlet protected from the elements, and use the switch to turn them on and off?

Best Answer

You need a weatherproof 4/O to single-gang plate with in-use cover:

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