I think it is just the multi ones. Let me tag in an electrical person lol. @Clayton0520 I am only plugging one thing in to the actual extension cord then running it to the timer if needed then plugging the timer into the multi grounded bar. So I have a total of two extension cords running to the bar each plugged into a different fixture.Ooooh ok gotcha gotcha. I always thought it wasnt safe to plug an extension cord into another extension cord? Or is that just for the multi ones?