We've recently discovered this works great for polycord:
http://www.amazon.com/858D-Station-S.../dp/B009PPRJHS
I happened to have one and brought it in. You might try it on cord or rope. But if you do get one, I HIGHLY recommend making a modification for safety's sake. They wired the neutral wire to the fuse rather than the hot, so even if your fuse blows, you still have 110V running through your unit.