Nimrod I found one place a 3 amp and another 5 amp was ok on the units. My old fuse block had some high rated fuses larger than 10 amp. I have now nothing larger than a 5 amp in my block or in line fuses. I may go ahead and drop the inline to 3 amp just to be on safe side. Just hate to see someone else have issues down the road when they could be prevented up front.