What is the IT System?IT System DefinitionIT system has its source either isolated from Earth or connected to Earth through an impedance (such as a resistor or an inductor). The consumer’s installation is connected to the earth through one or more local electrodes. These electrodes do not have any direct connection with the source.IT System Advantages Eliminates any risk of electric shock due to first faults on live conductors because there is no return path through Earth. Allows for continuity