An outdoor receptacle has two separate requirements, and satisfying one without the other is a very common oversight. The device itself has to be built for the environment, and the cover has to keep water out under the conditions the location actually experiences.
Weather-resistant devices are marked WR on the face or the mounting strap. They use different materials and plating chosen to resist corrosion, ultraviolet exposure and temperature swings. An ordinary indoor receptacle in an outdoor box will work for a while and then the contacts corrode, the grip weakens and the device fails. The WR marking is not decorative.
Covers divide into two categories that get confused constantly. A flip-lid cover, sometimes called a weatherproof cover, seals the receptacle when nothing is plugged in. That is acceptable only in damp locations, meaning places protected from direct rain, such as under a deep covered porch.
An in-use cover, the deeper bubble-style enclosure, keeps water out while a cord is plugged in and the lid is closed over it. Wet locations, meaning anywhere exposed to weather, require this type. The distinction matters because the whole point of an outdoor receptacle is that something will be plugged into it during weather, which is exactly when a flip-lid is standing open.
Both types need GFCI protection, either at the device or upstream, and the reason is obvious once the ground is wet. That protection is what makes an outdoor circuit survivable rather than merely functional.
The last piece is the box and its mounting. An outdoor box needs to be listed for wet locations, gasketed against the wall surface, and mounted so water runs off rather than collecting behind it. Silicone smeared around a box that was never rated for outside is not a substitute for the right enclosure.
Height and position matter as much as the hardware. A receptacle mounted low on a wall where snow piles against it, or directly under a roof edge with no gutter, will fail faster than an identical one placed sensibly. Choosing a spot that stays out of splash and runoff does more for longevity than any single component.
Further reading: more from Stayzada
