🔍 Key Concepts

• Difference between a wiring diagram and a schematic diagram (physical layout vs functional relationships) • What a one-line diagram looks like for a three-phase system (how many power conductors are shown) • Typical features of a logic diagram compared with motor control diagrams (logic gates vs relays/contactors)

💭 Think About

• Look at figure B and ask: Is it trying to show the exact physical location and routing of every wire, or is it mainly showing how each component works together electrically? • Count how many lines are used to represent the three-phase power going to the motor. Would a one-line diagram normally show that much detail? • Check whether the diagram uses logic gates (AND, OR, NOT) or relay/coil/contact symbols. What type of diagram normally uses those symbols?

✅ Before You Answer

• Decide whether the diagram emphasizes function or physical placement of parts. • Verify if all three motor phases (L1, L2, L3) are drawn separately; a true one-line diagram usually combines them into a single line. • Confirm whether you see logic gates anywhere; if not, eliminate the answer that requires them.