How are safety switches wired for relay operation?

The correct answer indicates that safety switches are wired in series for relay operation. Wiring safety switches in series is essential because it ensures that the relay circuit is completed only when all safety devices are closed, providing a fail-safe mechanism.

When switches are wired in series, the current must flow through each switch to complete the circuit. This means that if any one of the safety switches opens (such as in the case of an emergency or malfunction), the entire circuit is interrupted, and the relay will deactivate. This configuration is crucial in maintaining safety during operations, as it helps prevent accidents by ensuring that all safety measures are in place and operational before allowing power to flow to the circuit or machinery.

If safety switches were wired in parallel, the circuit could still be completed even if one or more switches were open, which would compromise safety. Similarly, a loop or mesh configuration does not apply to safety switches in this context, as these terms generally refer to different types of circuit arrangements that do not align with the safety requirements involved in relay operations. Therefore, the series wiring method effectively supports reliability and safety in electrical systems.