🔍 Key Concepts

• Look at figure B and trace the control circuit for the forward (F) and reverse (R) contactor coils. • Identify which auxiliary contacts labeled F are normally open (NO) and which are normally closed (NC), and notice where they are placed in the reverse coil circuit. • Think about why an electrical interlock is used so that the forward and reverse contactors cannot be energized at the same time.

💭 Think About

• When the motor is running forward, which F contacts change state from their normal condition, and how does that affect the path of current to the R coil? • Before the reverse start button can successfully energize the R coil, what must happen to the F coil and to the F auxiliary contact that is in series with the R coil? • Look at the seal-in (holding) circuit for the F coil: what happens to those F contacts when you hit the stop button, and how does that prepare the circuit for reverse operation?

✅ Before You Answer

• Verify which F contact in the reverse circuit is shown with NC symbols and confirm what its state is when F is energized versus de-energized. • Confirm that the motor must not be able to energize F and R at the same time; ensure the sequence you pick respects this interlock. • Check carefully whether the option you choose correctly describes the action of the normally closed versus normally open F contacts as drawn in figure B.