I do 10’ mega trees with 16 strands of lights on each one. One string goes up to the top and back down again, so it looks like I have 32 strands. I ziptie each end to a ring on the ground and then I just connect 8 sets in one direction end to end, and 8 sets in the other direction end to end. Then plug the remaining two male plugs into an ext cord and call it good. Never had any trouble with popping fuses or anything else. 8 sets doesn’t exceed the 3amp fuse rating. A kill-a-watt meter is a must for any decorator IMO. Good luck!