What is the purpose of fuses installed in a safety switch?

The purpose of fuses installed in a safety switch is to protect conductors from overcurrent. Fuses achieve this by providing a sacrificial link that melts and interrupts the circuit when the current exceeds a specified threshold. This function is critical because overcurrent conditions, which can arise from short circuits or overloads, can lead to overheating and potential fire hazards. By melting, the fuse effectively opens the circuit, preventing further current flow and thereby safeguarding the wiring and devices connected to the electrical system.

In contrast, the other options do not accurately describe the role of fuses in this context. Regulation of voltage pertains to devices designed to maintain voltage levels, while enhancing conductivity is not a function that fuses serve. Lastly, switching power on and off is a task performed by switches, not specifically by fuses. Therefore, the role of fuses is centered on the protection of electrical conductors, making the answer about overcurrent protection the correct choice.