When we built this place in '07 I installed a livestock drinker ~400' from the house.
Halfway there I set a pole with a weather box, waterproof flip switch for the heater in the drinker, and a duplex GFCI outlet to keep it all safe.
The GFCI outlets operate reliably for about three years, then they very quickly get to the point that they won't hold even the slightest load without tripping.
When this one gives up I'm going to do what I didn't know to do on day one - install a GFCI breaker in the load center where it will stay warm and dry.
