There are several different types of leakage current: Earth Line Leakage, Touch/Chassis (formerly Enclosure) Leakage, Patient Leakage, and Patient Auxiliary Current. The basic differences between leakage currents depend upon how a person might come in contact with the product or the measurement. For example the leakage that would flow through a persons body if they touched the outside enclosure of a product would be Touch/Chassis or Enclosure leakage.