Hospital Grade Receptacles include grounding reliability, assembly integrity, strength and durability tests. UL states that Hospital grade receptacles include the same markings that appear on general use receptacles, and also include “Hospital Grade” or “Hosp. Grade”, typically on the back of the receptacle where visible during installation. In addition to being orange, these outlets typically have a green triangle marking. A green dot specifies that it's a hospital-grade isolated ground outlet. Isolated ground means that the unit provides electricity that runs directly to the grounding point, separate from other electrical wiring in the home or building.