Which safety devices are used to protect against electrical shock?

Ground fault circuit interrupters (GFCIs) and residual current devices (RCDs) are crucial safety devices designed to prevent electrical shock. They work by monitoring the current flow in a circuit and quickly disconnecting power if they detect an imbalance between the live and neutral wires, indicating that current is leaking through an unintended path, such as a person who has come into contact with a live wire. This rapid disconnection can significantly reduce the risk of severe electric shock or electrocution.

Fuses and circuit breakers, which are also protective devices, primarily serve to prevent overcurrent situations that could lead to overheating and fires, but they do not specifically target the risk of electrical shock. Similarly, diodes, capacitors, and conductors play roles in circuit functionality and performance but do not provide shock protection. In summary, GFCIs and RCDs are specifically engineered to protect individuals from electrical shocks by interrupting the circuit when they detect unsafe conditions, making them the correct answer.