After my last trip to the yard for an annual haul out, my shore power cord was in need of a good cleaning. Years of sun and weather seem to make it harder and harder to keep them looking good, and they require more frequent attention. A friend and I were talking about how to better protect our cords and we talked about covering them with split-loom tubing. During a trip to the local electronics store, I found a 50-foot section of white 1¼-inch split-loom for $25.
I chose to use the 1¼-inch split-loom on my 50-amp cords because it fits well and leaves about a ¼-inch gap on the bottom of the cover, allowing for any condensation to drain out. After four months, the white split-loom tubing still looks good, and the shore power cord looks as good as it did after I last cleaned it.