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The NEC and HVAC Chapter Two

The National Electrical Code (NEC) and HVAC: The Basics

The NEC and HVAC Chapter Two

The NEC and HVAC Chapter Two - Chapter Two of the National Electrical Code (NEC) covers Wiring and Protection and starts at Branch Circuits, Feeder circuits, GFCI requirements and protection,. An HVAC installer may want to pay attention to branch circuit requirements. Article 220 in Chapter two of the NEC includes calculations for branch and feeder circuits including service calculations. (Table 220.3)
  • Specific branch circuit requirements for HVAC can also be found in Chapter 4 Article 440 – Air Conditioning and Refrigerating Equipment Branch Circuit Conductor Sizing
  • Article 424 – Fixed Electric Space Heating Equipment Branch Sizing
  • An entire chapter on motors including feeder circuits for motors
Chapter Two of the NEC also covers basic lighting which by code is done by Volt-Amperes per square foot. (Table 220.12) (more…)
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