The MEN or TNCS system of earthing required in Australian installations is an important and ubiquitous safeguard against indirect electric shock. However, the wide application of neutral earthing often create poorly diagnosed issues of current flow in earth paths and persistent voltages, some of which are harmless but of which some can and have been fatally hazardous. This presentation explains the MEN system, its nuances and common misconceptions. Through case examples, it highlights benefits and consequences for application of neutral earthing, the importance of maintaining and verifying integrity and methods for it, and situations that can result in harmful conditions.