Grounding terminals in circuits is essential for safety, particularly in mains-operated equipment, where exposed metal parts must be isolated from internal voltages and connected to actual ground to prevent electric shock risks. While many circuits can function without grounding, connecting ground points between interconnected circuits, like a preamplifier and amplifier, enhances safety and performance. Grounding ensures that any internal failures direct current to the ground, triggering circuit breakers or fuses to cut power. In DC rectifier circuits, the grounding of the negative terminal is common, but manufacturers often allow flexibility in grounding choices. Ultimately, grounding helps maintain safe operation and prevents electrical hazards.
