Part of my "Master Plan" is to build a series of racks with common features. One of the common features is the ability to hook up "satellite pads" to the rack that would be controlled from the same controller that handles the racks. I decided early on to use 110 plugs for this as well but I wanted to use ungrounded, 2 prong plugs. This was so that when setting up the range, there would never be any doubt as to which plug went where.
2 prong plugs are getting harder and harder to find but I found some.