This video shows how single-phase line voltage is distributed through an HVAC electrical system. The circuit uses L1, L2, neutral, and ground wires to supply power to different HVAC components. A multimeter measures 240 volts between L1 and L2, confirming the correct line voltage is present. The electrical panel distributes power to loads such as motors, transformers, and control circuits. Ground and neutral connections help provide safe operation and proper circuit function throughout the HVAC equipment.