NFPA 79:2021

Chapter 1 Administration 1.1 Scope. 1.2 Purpose. 1.3 Application. 1.4 Specific Provisions Other Than NFPA79. 1.5 Specific Provisions Not Made in Relation to NFPA70. 1.6 State of the Art. Chapter 2 Referenced Publications 2.1 General. 2.2 NFPA Publications. 2.3 Other Publications. 2.4 References for Extracts in Mandatory Sections. Chapter 3 Definitions 3.1 General. 3.2 NFPA Official Definitions. 3.3 General Definitions. Chapter 4 General Requirements and Operating Conditions 4.1 General Considerations. 4.2 Electrical Components and Devices. 4.3 Installation and Use of Listed or Labeled Equipment. 4.4 Electrical Supply. 4.5 Physical Environment and Operating Conditions. 4.6 Transportation and Storage. 4.7 Provisions for Handling. 4.8 Installation and Operating Conditions. 4.9 Available Fault Current. Chapter 5 Disconnecting Means 5.1 Machine Supply Circuit and Disconnecting Means. 5.2 Additional Disconnecting Means.5.3 Means for Removal of Power for Prevention of Unexpected Start-Up. Chapter 6 Protection from Electrical Hazards 6.1 General. 6.2 Basic Protection. 6.3 Fault Protection. 6.4 Protection by the Use of Protective Extra Low Voltage (PELV) or Class2Circuits. 6.5 Protection Against Residual Voltages. 6.6 Arc Flash Hazard Warning. Chapter 7 Protection of Equipment 7.1 General. 7.2 Overcurrent Protection. 7.3 Overload Protection of Motors. 7.4 Abnormal Temperature Protection. 7.5 Protection Against Supply Interruption or Voltage Reduction and Subsequent Restoration. 7.6 Overspeed Protection. 7.7 Phase Sequence Protection. 7.8 Protection Against Overvoltages Due to Lightning and Switching Surges. 7.9 Power Factor Correction Capacitor Overcurrent Protection. Chapter 8 Grounding and Bonding 8.1 General. 8.2 Equipment Grounding Conductors and Bonding Jumpers. 8.3 Control Circuits. 8.4 Lighting Circuits. Chapter 9 Control Circuits and Control Functions 9.1 Control Circuits. 9.2 Control Functions. 9.3 Protective Interlocks. 9.4 Control Functions in the Event of Failure.Chapter 10 Operator Interface and Control Devices 10.1 General. 10.2 Pushbutton Actuators and Color Graphic Interface Devices. 10.3 Indicator Lights and Icons of Color Graphic Interface Devices. 10.4 Illuminated Pushbuttons. 10.5 Rotary Control Devices. 10.6 Start Devices. 10.7 Devices for Stop and Emergency Stop. 10.8 Devices for Emergency Switching Off. 10.9 Displays. Chapter 11 Control Equipment: Location, Mounting, and Enclosures 11.1 General Requirements. 11.2 Location and Mounting. 11.3 Degrees of Protection. 11.4 Enclosures, Doors, and Openings. 11.5 Spaces Around Control Cabinets and Compartments. Chapter 12 Conductors, Cables, and Flexible Cords 12.1 General Requirements. 12.2 Conductors. 12.3 Insulation. 12.4 Conductor Markings. 12.5 Conductor Ampacity. 12.6 Conductor Sizing. 12.7 Conductors and Cables Used for Flexing Applications. 12.8 Cords. 12.9 Special Cables and Conductors. Chapter 13 Wiring Practices 13.1 Connections and Routing. 13.2 Identification of Conductors.13.3 Wiring Inside Enclosures. 13.4 Wiring Outside Enclosures. 13.5 Raceways, Support Systems (Cable Supports), Connection Boxes, and Other Boxes. Chapter 14 Electric Motors and Associated Equipment 14.1 General Requirements. 14.2 Conductors Supplied from Separate Disconnects. 14.3 Reserved. 14.4 Motor Dimensions. 14.5 Motor Mounting and Compartments. 14.6 Criteria for Selection. 14.7 Protective Devices for Mechanical Brakes. 14.8 Direction Arrow. 14.9 Marking on Motors. 14.10 Motor Controllers. Chapter 15 Accessories and Lighting 15.1 Accessories. 15.2 Local Lighting of the Machine and Equipment. Chapter 16 Marking and Safety Signs 16.1 General. 16.2 Safety Signs for Electrical Enclosures. 16.3 Function Identification. 16.4 Machine Nameplate Data. 16.5 Equipment Marking and Identification. Chapter 17 Technical Documentation 17.1 General. 17.2 Information to Be Provided. 17.3 Requirements Applicable to All Documentation. 17.4 Basic Information. 17.5 Installation Diagram.17.6 Block (System) Diagrams and Function Diagrams. 17.7 Circuit Diagrams. 17.8 Operating Manual. 17.9 Maintenance Manual. 17.10 Parts List. Chapter 18 Testing and Verification 18.1 General. 18.2 Continuity of the Effective Ground-Fault Current Path. 18.3 Insulation Resistance Tests. 18.4 Voltage Tests. 18.5 Protection Against Residual Voltages. 18.6 Functional Tests. 18.7 Retesting. Chapter 19 Servo Drives and Motors 19.1 Overcurrent Protection for Drives and Servo Motors. 19.2 Motor Overtemperature Protection. 19.3 Servo Drive System Conductors. 19.4 Contactor. 19.5 Cable Shield. Annex A Explanatory Material Annex B Inquiry Form for the Electrical Equipment of Machines Annex C Examples of Industrial Machines Covered by NFPA79 Annex D Technical Documentation Annex E Device and Component Designations Annex F Electrical Enclosure Ratings: Type-Rating Versus IP-?Rating Annex G Kilowatt Outputs with Horsepower Equivalents Annex H Minimizing the Probability of Control Function Failure Annex I AWG Conductor Cross-Reference Table Annex J Electrical Terms Defined Annex K Informational References

The provisions of this standard shall apply to the electri‐ cal/electronic equipment, apparatus, or systems of industrial machines supplied from a nominal voltage of 1000 volts or less, and commencing at the point of connection of the supply circuit conductors to the electrical equipment of the machine.