I use about a 3 foot piece of chain with the link size that could pull a car without fear of braking. I use the aluminum piece on the PT50C with a padlock on the chain and through the aluminum, then I wrap the chain around the pedestal tightly and put another lock through two of the links. It's just to keep the honest folks out. If someone want it, or anything else in or about your MH, they can take it.
If the aluminum is a worry for you, then wrap the chain around the short cord on the PT50C and padlock it on each side so the chain cannot be "unwoound," them padlock it around the pedestal. If the water spigot is next to the pedestal I sometime include it along with the pedestal.
I use a much smaller chain for my CarryOut Antenna, 40 feet of it.
Wayne MSGT USMC (Ret) & Earlene (CinCHouse)
2008 Winnebago Destination 39W
It is what it is, and then it is what you make of it.