Define grounding.

• A. The process of connecting electrical systems to earth to stabilize voltage and provide a fault path.
• B. The practice of isolating equipment from earth to prevent shock.
• C. A method of increasing circuit resistance.
• D. A type of protective equipment worn by linemen.

Answer: (A)

Grounding is the deliberate connection of electrical systems and equipment to the earth, creating a stable reference for voltage and a low-impedance path for fault current to flow to ground. This serves two main safety and performance goals. First, it keeps exposed metal parts at or near earth potential, reducing the risk of shock if someone touches them. Second, when a fault occurs, the fault current has a clear path to earth, which allows protective devices (like fuses or breakers) to sense the fault and trip quickly, clearing the fault and limiting damage. Grounding also helps manage transient voltages and keeps the system's voltages from drifting with respect to earth.

The idea of isolating equipment from earth would leave the system floating and unsafe, since there would be no reliable path for fault current. Simply increasing circuit resistance would impede fault current and delay or prevent protective devices from tripping. Wearing protective equipment is important for safety but does not establish a grounding path.