Why is a grounded outlet necessary to power the heater?

A grounded outlet is a safety measure to protect the user from electric hazards. Outlets are devices that are used to connect electrical devices to the main power grid. While outlets come in various types, the most common type used in homes is the grounded version. Grounded outlets have three connections: live, neutral and ground. Ground connection is not connected to the grid but to a grounding electrode driven into the ground. Electrical appliances have their chassis connected to earth through this grounding connection, which provides a low-resistance path for any electrical leakage that would otherwise pass through the user’s body, thereby preventing electrical shock.