Electrical Switching, Timing, and Control Devices


Part 1 (26:48 min)
  • Basic Ladder Diagrams

  • Information-Provider Switches

  • SPST, SPDT, DPST, and DPDT Switches

  • Proper Component Wiring Connections

  • Control Device Troubleshooting: Static and Dynamic Checks

Part 2 (24:26 min)
  • Understanding Drum Switch Operation (Cam and Segmented) and Its Use in the Reversal of Motors
  • Use of Control Relays (Standard & Latching) and their Troubleshooting
  • ON-delay and OFF-delay Timer Action, Timing Control, and Troubleshooting



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