Final answer:
Grounding clips secure Equipment Grounding Conductors to metal outlet boxes, ensuring the grounding of electrical systems.
Step-by-step explanation:
Grounding clips are used to secure Equipment Grounding Conductors (EGCs) to metallic outlet boxes. The grounding process involves fixing a conductor at zero volts by connecting it to the earth with a good conductor. This is crucial in a three-wire system, which includes a live/hot wire, a neutral wire, and an earth/ground wire to guard against electrical hazards. A well-grounded system ensures that, in the case of worn insulation that allows a live/hot wire to contact a metallic case, the circuit breaker will trip, preventing shock hazards and forcing repair of the appliance. Grounding clips play a vital role in maintaining the integrity of this safety mechanism.
One noteworthy scenario illustrating the importance of grounding is when worn insulation allows the live/hot wire to come into direct contact with the case of an appliance, as seen in Figure 23.32. Without a proper earth/ground connection, an individual can receive a severe electric shock. However, with a proper earth/ground connection facilitated by grounding clips, a circuit breaker will activate, ensuring the appliance is repaired before it can cause harm. Another aspect to consider is that some appliances are sold with two-prong plugs and have non-conducting cases, which are designated as doubly insulated, eliminating the need for a grounding connection.