Christmas lights can be plugged into a Ground Fault Circuit Interrupter.
How to protect christmas lights from water. Unplug all the Christmas lights then power one strung at a time to find the fault. Please leave any comments that you might have done to improve this design. Turn the lights so the sockets all point downward so the sockets dont fill with water.
Wrap Teflon tape electrical tape securely and carefully around the plugs completely coating the plug to prevent water from getting in and effectively creating a water-tight seal. Be sure these cords stay cool and dry. When setting up patio lights or Christmas displays if may be necessary to plug several light strings together.
You can do something as simply as place a 2 piece of pipe on the ground and placing the connection up on the pipe. During rainy weather there are many ways to protect outdoor lights. Firstly to be entirely on the safe side you have to plug the Christmas lights into GFCI or outdoor outlets rather than indoors.
The official subreddit for Oregon. You can plug a second string of Christmas lights into the first by applying a gasket to the male plug and firmly press the two together. Whether its Christmas lights or putting lights into candy canes or lighted pumpkins on Halloween you need to look for a label on the product package that says outdoor Other packages will say something like indooroutdoor or just indoor You should not use either of these for outdoor purposes Use solar lights.
Plug the Christmas lights into your Ground Fault Circuit Interrupter GFCI or outdoor outlet. Can string lights be left in the rain. You can alternatively use electric tapes or waterproof seals that will keep the connectors and extension cords from getting wet.
All electrical devices will degrade when exposed to sunshine water snow wind rain and hail. 6 Close off the open back. Seal out the water with vasoline where the bulb meets the socket.

