I have a Blue ox coiled electrical cable that runs from M/H to Toad. I purchased it in 2010 from Blue ox. I have noticed that the outer covering of the cable has many cracks from one end to the other....
My 7 conductor, non-coiled, non-branded, cord that I put together myself stays put on the motorhome and is doing just fine. It is about 5 years old years old now.