Originally Posted by fw2007
I hope that designs for outdoor holiday lighting have changed so as to protect all connections from wetness. Otherwise, if more than one string is connected, there might be a non-water tight connection anywhere along the string.
I've strung many strings of lights through the holidays in an area where it always snows. I have never worried about water getting into the plugs and connectors, with all the lights and hundreds of feet of power cords it would be too much of a hassle to try and water proof the connections. Besides the strings of lights don't last all that long to begin with, couple seasons or so.
Even my home-made power distribution boxes though not waterproof, they have held up quite well and continue to work every time I wire the boxes in.