IEEE 278 -1967

IEEE 278 -1967 is a technical guide for classifying electrical insulating materials exposed to neutron and gamma radiation. It is aimed at power, energy, nuclear engineering, and related electrical systems where radiation can change insulation behavior over time. By giving a common classification approach, it helps engineers compare materials more consistently and supports better material selection for demanding environments where reliability and insulation performance are critical.

Overview of IEEE 278 -1967

This standard addresses the classification of insulating materials used in radiation-exposed applications, with emphasis on neutron and gamma environments. IEEE 278 -1967 is relevant to components, circuits, devices, and engineered materials where insulation properties may be affected by irradiation. Its technical context is especially important for design and evaluation work that needs a clear basis for identifying material suitability, tracking performance changes, and maintaining consistent engineering judgments across projects.

Typical use cases

IEEE 278 -1967 is typically used when evaluating insulation for electrical equipment that may operate near radiation sources, such as nuclear facility instrumentation, control assemblies, and other sensitive components in power or research settings. It can also support material screening for dielectrics, cable insulation, and protective parts where neutron and gamma exposure is a concern. The guide is useful during specification review, qualification planning, and comparison of candidate insulating materials for service conditions that are not purely electrical.

Why it matters

Radiation can alter insulating materials in ways that affect electrical integrity, so a consistent classification method helps reduce uncertainty in design and procurement. IEEE 278 -1967 supports clearer communication between engineers, suppliers, and testing groups by aligning expectations for material behavior under neutron and gamma exposure. For projects where insulation reliability is tied to safety or operating continuity, the standard can help improve consistency in evaluation and lower the risk of unsuitable material selection.

• Radiation exposure classification
• Electrical insulating materials
• Neutron and gamma environments
• Material selection and evaluation
• Insulation performance consistency