L1 What Is Electricity?
L2 Watts How Hard the System Works
L2a Time Alive- Batteries
L2b Current Measurement Matters
L3 AC for Alarm Techs
L3a Voltage Drop in Action
L4: Why the Meter Matters
L5 How a Fire Alarm System Thinks
L5a Definitions That Actually Matter
L6 IDC vs SLC Explained
L7 End of Line Resistors (Supervision)
L7a Where EOL Resistors Are Used
L7b Finding the EOL in the Field
L7c Common EOL Mistakes
L8 Ground Faults: What They Are and What They Do
L9 Open Circuits: What they are and why they matter
L10 Short Circuits: What they are and why they matter