Testing for polarity, ground and voltage drop are explained. Modern furnace and A/C circuits are examined. Schematic diagram use and application are discussed. Part 4 - Schematic Diagrams, Electrical Service Panels and Compressors (1 hour 58 minutes) Open and closed switches are explained and appropriate reading indications are considered. Wire sizing charts are discussed as well as electrical indicating devices. Ohm’s Law is explained using formula and three phase use and application to an electric HWH is considered, Series and parallel circuits are revisited with respect to voltage, amperage and resistance with application to remote sensors. Part 3 - Ohm's Law, Series and Parallel Circuits, and Meters (57 minutes) PSC motor facts and the Fan Laws are explained. Motor types, specifications and how to order a replacement motor are considered. Electric motor construction including windings and bearings are discussed. Solenoids and heat anticipation are considered for heating and cooling systems. Application and wiring diagrams are offered for a condenser fan circuit, humidifier, furnace, converting a heating only system to heat/cool and converting a powerpile system to 24 VAC. Part 2 - Relays, Contractors and Motors (1 hour 40 minutes)Įlectrical symbols and switches are explained. Series and parallel circuits are discussed and how voltage, amperage and resistance react in each. The basic principles of electricity are discussed such as the necessary components for current to flow, short circuits, magnetism and transformers are all discussed. Current flow through conductors and insulators is explained using a water system analogy. Part 1 - Atoms, Current Flow and Circuits (1 hour)Įlectricity is defined relative to atomic structure.
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