Isolated power is a special type of power distribution system used in critical care areas of health care facilities. It is designed to protect patients and staff from electric shock hazards associated with ground-fault currents present during certain medical procedures. Isolated Power Systems (IPS) use a hospital grade isolation transformer to isolate both power conductors from the building’s electrical ground, eliminating the neutral-ground reference. Thus, the term “un-grounded” is often used to describe IPS. Unlike ordinary Ground Fault Circuit Interrupters (GFCI), Isolated Power Systems do not trip or shut down power to critical medical equipment when an initial ground-fault occurs.