2024 NFPA 79 Electrical Standard for Industrial Machinery

NFPA 79, Electrical Standard for Industrial Machinery 2024 edition establishes mandatory electrical safety requirements for industrial machinery — from single-motor drill presses to complex automated manufacturing systems. The standard covers the full scope of machine electrical design and installation: supply circuits, disconnecting means, overcurrent protection, control circuits, grounding and bonding, operator interface devices, and programmable electronic systems. It serves as the companion standard to both NFPA 70 (NEC) and NFPA 70E, and the 2024 edition adds new cybersecurity considerations, terminology updates, and targeted clarifications across control circuits, proximity switches, and lighting circuit protection.

Who Uses NFPA 79

Required by electrical engineers, machine designers, OEM manufacturers, system integrators, industrial electricians, and inspectors responsible for the design, installation, and compliance of electrical systems on industrial machinery. Always verify which edition is adopted in your jurisdiction or referenced in your facility's applicable standards before purchasing.

What's New in the 2024 Edition

The 2024 edition adds cybersecurity provisions and delivers targeted clarifications across control circuits, measurements, and overcurrent protection, including:

• New Chapter 4 section addressing cybersecurity considerations for industrial machinery electrical systems.
• Clarification on the use of control circuit conductor protection in Chapter 7.
• Metric measurements revised to soft conversions in Chapter 11 to avoid potential negative safety impacts.
• Removal of the term "hazardous" from Chapter 7 and replacement of "conductor" with "wire" in Chapter 12.
• Revisions to requirements for proximity switches and listed splicing wire connectors.
• Updated Chapter 15 clarifying the application of externally supplied lighting circuit overcurrent protection.

Stay compliant with the electrical safety requirements for industrial machinery in your facility.

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