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