I use a short piece of chain and a combination lock. Wrap the chain around the power pedestal with the door open, hook the lock to the tab on the EMS and through the links in the chain as tight as I can get it. Then turn it on and close the pedestal door. The chain is tight enough the unit can't be slipped up and over since the pedestal door is in the way. Can the chain be cut? Sure, but it would keep a casual theft at bay. No issues of any kind in over 5 years full time use. I also keep a piece of duct tape over the EMS flashing LED. It keeps from advertising itself at night.
