What is the difference between SPT-1 and SPT-2 Christmas light cords?

When you are looking online at Christmas light strings you might have noticed SPT-1 and SPT-2 specifications.  You’ll see that specification when you are shopping for C7 and C9 Christmas bulbs and cords. This spec … Continue reading What is the difference between SPT-1 and SPT-2 Christmas light cords?