The function of an earth wire is to protect electrical appliances or instruments from sudden damage due to voltage increase or current leakage. The earth wire is a particular wire with low resistance and a high melting point that avoids live wire overloading and current leakage through the ground. The metallic body of electric appliances is connected to the earth by means of an earth wire so that any leakage of electric current is transferred. The earth wire is also used for safety measures. If any current is leaked, the earth wire helps to ground the leakage of current. The ground wire, which is an electrical wire that extends into the ground below your home, has a similar function. Its purpose is to give excess electrical charges a safe place to go, where they can be discharged without the risk of electrical shock or fire.