With all the equipment we use in our aquariums there is always the possibility that some type of short or ground fault will occur. A "ground fault" is a conducting connection between any electric conductor and any conducting material that is grounded or that may become grounded. Electricity always wants to find a path to ground. In a ground fault, electricity has found a path to ground, but it is a path the electricity was never intended to be on, such as through a person's body.
