In an SPDT starter interrupt relay wired "Normally Closed", which two terminals connect to the starter wires?

In an SPDT (Single Pole Double Throw) starter interrupt relay that is wired "Normally Closed," the configuration determines how the relay allows or interrupts the flow of current in the circuit. The relay has multiple terminals: common (30), normally closed (87a), normally open (87), and coil terminals (85 and 86).

When the relay operates in a "Normally Closed" state, it means that when the relay is not activated (i.e., no voltage is applied to the coil), the circuit between the common terminal (30) and the normally closed terminal (87a) is complete. This allows current to flow through to the starter wires from terminal 30 to terminal 87a.

Thus, the correct choice is the pair connecting terminal 30 to terminal 87a because it reflects the configuration in which the relay allows current to flow unchanged when in the deactivated state. This setup is crucial for applications needing interruption of the starter circuit under specific conditions while ensuring that the starter receives power when the relay is not activated.

Understanding the function of each terminal is key here, as the common (30) acts as the input for the power that will go to either terminal based on the relay's state. When the relay is