Final answer:
Proper grounding protects appliances from power surges and users from electric shocks but does not directly prevent devices from overheating or cables from corrosion.
Step-by-step explanation:
Proper grounding serves several safety functions in electrical systems. First, it protects appliances from power surges by providing a path for excess electricity to flow into the earth, which helps prevent damage to electrical components. Second, it guards against electric shocks to users by ensuring that any stray voltage does not remain on the appliance casing but is instead safely diverted to the ground. Lastly, by preventing unwanted electrical paths, grounding contributes to the overall safety of the electrical system, which can indirectly prevent overheating of devices connected to that system.
Regarding electrical safety systems, the three-wire system is essential. It uses live/hot, neutral, and earth/ground wires, with both the neutral wire and the case of the appliance grounded to protect against shocks and thermal hazards. Ground Fault Interrupters (GFIs) are devices that detect the loss of current to unintentional paths, such as through a person, and they quickly shut off power to prevent electric shocks.
While grounding helps protect against electrical surges and shocks, it does not directly address issues like overheating of devices or corrosion of cables. Overheating is generally prevented through proper circuit design, ventilation, and heat sinks, and cable corrosion is typically related to environmental factors and material choice rather than grounding.