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NFPA 79 2024

NFPA 79 2024

$62.08

NFPA 79: Electrical Standard for Industrial Machinery

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NFPA 2024
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Help mitigate electrical hazards involving industrial machinery. NFPA 79, Electrical Standard for Industrial Machinery, includes updates for requirements that deal with the full spectrum of equipment from single-motored drill presses to complex automated manufacturing systems. This must-have companion to both NFPA 70 , National Electrical Code (NEC ), and NFPA 70E , Standard for Electrical Safety in the Workplace , is newly revised to contend with new technologies and their effects on electrical safety. Help ensure essential protection for operators, equipment, facilities, and work in progress.

PDF Catalog

PDF Pages PDF Title
2 Important Notices and Disclaimers
3 Additional Important Notices and Disclaimers
12 Chapter 1 Administration
1.1 Scope.
1.2 Purpose.
1.3 Application.
1.4 Specific Provisions Other Than NFPA 79.
1.5 Specific Provisions Not Made in Relation to NFPA 70.
1.6 State of the Art.
Chapter 2 Referenced Publications
2.1 General.
2.2 NFPA Publications.
2.3 Other Publications.
13 2.4 References for Extracts in Mandatory Sections.
Chapter 3 Definitions
3.1 General.
3.2 NFPA Official Definitions.
3.3 General Definitions.
18 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.
19 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.
4.10 Cybersecurity.
Chapter 5 Disconnecting Means
5.1 Machine Supply Circuit and Disconnecting Means.
21 5.2 Additional Disconnecting Means.
22 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.
24 6.3 Fault Protection.
6.4 Protection by the Use of Protective Extra Low Voltage (PELV) or Class 2 Circuits.
6.5 Protection Against Residual Voltages.
25 6.6 Arc Flash Hazard Warning.
Chapter 7 Protection of Equipment
7.1 General.
7.2 Overcurrent Protection.
29 7.3 Overload Protection of Motors.
7.4 Abnormal Temperature Protection.
7.5 Protection Against Supply Interruption or Voltage Reduction and Subsequent Restoration.
30 7.6 Overspeed Protection.
7.7 Phase Sequence Protection.
7.8 Protection Against Overvoltages Due to Lightning and Switching Surges.
31 7.9 Power Factor Correction Capacitor Overcurrent Protection.
Chapter 8 Grounding and Bonding
8.1 General.
8.2 Equipment Grounding Conductors and Bonding Jumpers.
32 8.3 Control Circuits.
8.4 Lighting Circuits.
Chapter 9 Control Circuits and Control Functions
9.1 Control Circuits.
33 9.2 Control Functions.
36 9.3 Protective Interlocks.
9.4 Control Functions in the Event of Failure.
37 Chapter 10 Operator Interface and Control Devices
10.1 General.
38 10.2 Pushbutton Actuators and Color Graphic Interface Devices.
10.3 Indicator Lights and Icons of Color Graphic Interface Devices.
39 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.
40 11.2 Location and Mounting.
41 11.3 Degrees of Protection.
11.4 Enclosures, Doors, and Openings.
11.5 Spaces Around Control Cabinets and Compartments.
42 Chapter 12 Conductors, Cables, and Flexible Cords
12.1 General Requirements.
12.2 Conductors.
44 12.3 Insulation.
12.4 Conductor Markings.
12.5 Conductor Ampacity.
12.6 Conductor Sizing.
46 12.7 Conductors and Cables Used for Flexing Applications.
47 12.8 Cords.
12.9 Special Cables and Conductors.
48 Chapter 13 Wiring Practices
13.1 Connections and Routing.
50 13.2 Identification of Conductors.
51 13.3 Wiring Inside Enclosures.
13.4 Wiring Outside Enclosures.
52 13.5 Raceways, Support Systems (Cable Supports), Connection Boxes, and Other Boxes.
55 Chapter 14 Electric Motors and Associated Equipment
14.1 General Requirements.
14.2 Conductors Supplied from Separate DisconnectsDisconnecting Means.
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.
56 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.
57 16.4 Machine Nameplate Data.
16.5 Equipment Marking and Identification.
Chapter 17 Technical Documentation
17.1 General.
17.2 Information to Be Provided.
58 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.
59 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.
60 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
71 Annex B Inquiry Form for the Electrical Equipment of Machines
74 Annex C Examples of Industrial Machines Covered by NFPA 79
Annex D Technical Documentation
93 Annex E Device and Component Designations
94 Annex F Electrical Enclosure Ratings: Type-Rating Versus IP-⁠Rating
99 Annex G Kilowatt Outputs with Horsepower Equivalents
100 Annex H Minimizing the Probability of Control Function Failure
Annex I AWG Conductor Cross-Reference Table
102 Annex J Electrical Terms Defined
104 Annex K Informational References

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