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Devices that have built-in shutters to prevent insertion of anything into one slot only are called:

A. Safety outlets
B. Single-phase connectors
C. Tamper-resistant receptacles
D. Grounded plugs

Answer :

Final answer:

Tamper-resistant receptacles are devices that have built-in shutters to prevent the insertion of any object into only one slot (c). They are part of several safety measures including the three-wire system and devices like circuit breakers and GFCIs, all aimed at minimizing the risk of electric shocks.

Explanation:

Devices that have built-in shutters to prevent insertion of anything into one slot only are called Tamper-resistant receptacles. These are designed with safety features that prevent foreign objects from being inserted into them, thereby reducing the risk of electric shocks. Tamper-resistant receptacles use a built-in shutter system that only opens when both slots are engaged simultaneously, such as by the prongs of a plug.

The three-wire system used in most electrical outlets includes live/hot, neutral, and ground wires. The purpose of this system is to guard against thermal and shock hazards. An essential part of this system is grounding the neutral wire and the case of the appliance to prevent shock.

Aside from the three-wire system, other electrical safety systems include circuit breakers and ground fault circuit interrupters (GFCIs). These devices prevent thermal overload and inadvertent flow of electric current to unintended paths, thereby providing additional safety against electric shocks.

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