🔍 Key Concepts

• Difference between capacitor start, induction run and capacitor start, capacitor run single‑phase motors based on how many capacitors are in the circuit and when they are connected • How a current relay is wired (in series with the run winding or line) versus how a potential relay is wired (across the start winding or capacitor) • What the contacts labeled 1‑2 and the coil connection at point 5 in figure B tell you about when the start capacitor is removed from the circuit

💭 Think About

• Look closely at figure B and count how many capacitors are shown and which ones remain connected to the circuit after the relay contacts 1‑2 open—does any capacitor stay in the run circuit? • Trace the path of the relay coil from terminal 5: is it effectively in series with the line/run winding (responding to current) or across the start winding/capacitor (responding to voltage)? • Ask yourself: does this relay operate when current is high at start or when the voltage across the start winding/capacitor rises as the motor comes up to speed?

✅ Before You Answer

• Verify whether one or two capacitors are drawn in figure B and which branch each one is in • Confirm if the relay coil is effectively in series with the line/run winding (typical of a current relay) or in parallel across the start winding/capacitor (typical of a potential relay) • Ensure your final choice matches both the motor type (induction run vs capacitor run) and the relay type (current vs potential) as indicated by the schematic, not just one of them