NFPA 79 Training – Electrical Standard for Industrial Machinery (2024)

Our NFPA 79 Training course is a practical, code-based guide to the 2024 Electrical Standard for Industrial Machinery. It covers disconnecting means, short-circuit current rating (SCCR), overcurrent and surge protection, grounding and bonding, control circuits, safety functions, wiring practices, marking, documentation and testing.

This 12 hour instructor-led training course turns the 2024 requirements into decisions you can apply on the plant floor and in the panel shop. You’ll work through SCCR, conductor sizing and inspection exercises based on real machines.

Why NFPA 79 Training Matters

Industrial machines fail inspections, injure workers and cause expensive downtime when their electrical equipment is poorly designed, wired or modified. Undersized conductors, a missing or incorrect SCCR, weak grounding and improperly designed emergency stop circuits are among the most common findings by inspectors and third-party evaluators.

NFPA 79 is the standard that the NEC (Article 670), OSHA and authorities having jurisdiction rely on for the electrical equipment of industrial machines. It works alongside UL 508A for industrial control panels, NFPA 70E for safe work practices, NFPA 70B for maintenance, and IEC 60204-1 and CSA C22.2 No. 301 for machines shipped internationally.

 

Course Highlights

The course concentrates on four areas:

  • Power supply, disconnecting means, SCCR and protective devices
  • Safety functions, emergency stop, interlocks and control circuits
  • Conductors, wiring practices, enclosures, motors and drives
  • Marking, documentation, testing, verification and maintenance of modified machinery

 

Learning Outcomes

By the end of this course, participants will be able to:

  • Explain the scope of NFPA 79 (2024) and how it relates to NEC Articles 670 and 409, UL 508A, NFPA 70E, NFPA 70B and OSHA
  • Identify the key changes in the 2024 edition and what they mean for new and existing machines
  • Select and apply disconnecting means, including lockout, interlocking and labelling requirements
  • Determine a machine’s SCCR and verify that it is adequate for the available fault current
  • Apply overcurrent, motor overload and surge protection requirements, including SPDs in safety circuits
  • Apply grounding, bonding and protection against electric shock, including PELV systems and residual voltage
  • Apply stop categories 0, 1 and 2 and the requirements for emergency stop, interlocks and protection against unexpected start-up
  • Size conductors and apply colour coding, insulation and wiring practices for machines and control panels
  • Prepare the markings, nameplate data, diagrams and technical documentation that inspectors expect
  • Perform and document verification tests, and inspect modified or retrofitted machinery for compliance

Participants receive a certificate of completion and PDF course materials.

 

Course Approach

This course is instructor-led and grounded in the code. Every module ties a requirement in the standard to a practical decision about design, inspection or maintenance.

Worked examples, live polls and short exercises reinforce each topic. Exercises include an SCCR calculation, conductor and overcurrent sizing, and a machine inspection checklist.

Participants leave with checklists and reference material they can use immediately on their own machines and control panels.

 

Related Courses

 

Live online course schedule

December 3–4, 2026
10:00 am - 4:30 pm ET

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Who should attend

Our course is designed for workers who are responsible for repairing and maintaining the electrical components of industrial machines:

  • Maintenance electricians and technicians
  • Machine builders, OEM engineers and designers
  • Control panel builders and UL 508A shops
  • Systems integrators and automation engineers
  • Plant and facility engineers
  • Electrical contractors and inspectors
  • EHS, safety and compliance professionals
  • Engineers responsible for modifying or retrofitting existing machinery

 

Course Benefits

  • NFPA 79 Training Certificate
  • 1.2 Continuing Education Unit (CEU) Credits (12 Professional Development Hours)
  • FREE 100-Page Digital Electrical Safety Handbook (Value $20)
  • $100 Coupon Toward Any Future Electricity Forum Course (Restrictions Apply)
  • FREE Magazine Subscription (Value $25.00)
  • Course Materials In PDF Format

 

NFPA 79 Training Course Outline

 

DAY ONE

 

Module 1: NFPA 79 Scope, the 2024 Changes and Related Standards

  • Purpose, scope and application of NFPA 79
  • Relationship to NEC Articles 670 and 409, UL 508A, NFPA 70E, NFPA 70B and OSHA
  • Harmonization with IEC 60204-1 and CSA C22.2 No. 301
  • Key definitions and terminology
  • Summary of the 2024 changes
  • Live poll: current compliance challenges

 

Module 2: Risk Assessment, Safety Functions and Stop Categories

  • Machine safety philosophy and risk assessment
  • Stop categories 0, 1 and 2
  • Emergency stop and emergency switching off
  • Safety-related control functions and an overview of ISO 13849
  • Protection against unexpected start-up
  • Case study: an emergency stop failure

 

Module 3: Incoming Supply, Disconnecting Means and SCCR

  • Supply conductor terminations and environmental limits
  • Supply circuit disconnecting means: types, location and operating handles
  • Lockout capability, interlocking and excepted circuits
  • 2024 marking of circuits that remain energized when the disconnect is open
  • Short-circuit current rating: determination and marking, including machines with multiple panels
  • Exercise: SCCR calculation

 

Module 4: Overcurrent, Motor and Surge Protection, and Protection Against Electric Shock

  • Overcurrent protection for supply, power and control circuits
  • Motor overload and overtemperature protection
  • Surge protective devices, including SPDs in safety circuits
  • Protection against direct and indirect contact
  • PELV systems and residual voltage
  • Exercise: selecting protective devices

 

Module 5: Grounding, Bonding, Control Circuits and Interlocks

  • Equipment grounding and the protective bonding circuit
  • Grounded and ungrounded control circuits
  • Control circuit voltages, transformers and power supplies
  • Control functions, interlocks and wireless controls
  • Ground fault detection in control circuits
  • Day 1 review and live poll

 

DAY TWO

 

Module 6: Operator Interface, Control Equipment and Enclosures

  • Pushbuttons, indicator lights, colours and markings
  • HMIs and operator interface devices
  • Control panel layout, spacing and accessibility
  • Enclosure ratings, doors, openings and interlocks
  • Location and mounting of control equipment
  • Live poll: panel design issues

 

Module 7: Conductors, Cables and Wiring Practices

  • Conductor types, classes, insulation and ampacity
  • Sizing conductors and applying correction factors
  • Colour coding and conductor identification
  • Wiring inside and outside enclosures, raceways and flexible cords
  • MTW, TC-ER and machine tool cable applications
  • Exercise: conductor and overcurrent sizing

 

Module 8: Motors, Drives, Servo Systems, Lighting and Accessories

  • Motor requirements, mounting and nameplate data
  • Adjustable speed drives and power conversion equipment
  • Servo drives and motors
  • Socket outlets, machine lighting and accessories
  • EMC and drive-related grounding considerations
  • Case study: a drive-related failure

 

Module 9: Marking, Documentation, Testing, Verification and Cybersecurity

  • Machine nameplate, warning labels and safety signs
  • Technical documentation, diagrams and parts lists
  • Continuity of the protective bonding circuit, insulation resistance and voltage tests
  • Functional testing and SPD verification
  • Cybersecurity considerations for industrial machinery
  • Live poll: documentation gaps

 

Module 10: Inspection, Maintenance, Retrofits and Case Studies

  • Inspecting existing and modified machinery
  • NFPA 791 field evaluation of unlabelled equipment
  • Preventive maintenance aligned with NFPA 70B
  • Safe work practices under NFPA 70E
  • Exercise: machine inspection checklist
  • Case studies, course review and final test

 

COURSE SCHEDULE

Start: 10 a.m. Eastern Time
Finish: 4:30 p.m. Eastern Time

 

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Earn Continuing Education Unit (CEU) Credits

  • Successful completion of this course qualifies delegates to receive a certificate of course completion with indicated CEUs.
  • One CEU is equivalent to 10 professional development hours of instruction.
  • This course earns 1.2 CEUs.

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