When the control coil is energized in a standard SAE relay, which of the following relay circuits is switched to closed status? \( 1-2(86-85) \) \( 2-3(85-30) \) \( 3-4(30-87 a) \) \( 3-5(30-87) \)

When the control coil of a standard SAE relay is energized, the circuit that is switched to a closed status is \( 2-3(85-30) \). Here, the control voltage applied to the coil (between terminals 85 and 86) engages the relay, creating a connection between the common terminal 30 and the normally open terminal 87 (and 87a, if it's a changeover relay). Additionally, it's important to note that relays can be utilized in various applications, such as in automotive systems for controlling lights, motors, or even HVAC systems. They allow low-power circuits to control high-power devices safely and efficiently, hence ensuring longevity and reliability in your electrical systems!