The term earthing with reference the house electrical wiring refers to establishing a wired connection to ground ( earth ). All the high wattage electrical gadgets such as fridge, air conditioner ( AC ) , water heater , room heater , centralized AC and other such devices are also connected to the earthing wire as a measure of safety. The neutral wire is also a type of earthing wire but the grounding is done at the transformer. Whereas for residential additional ground or earthing is also established inside the residential building as a safety mechanism. The earthing connection provides the protection to the user and the electrical gadget in the event of any short circuit or current leakage.