Which term describes contents that are so low in combustibility that self-propagating fires cannot occur?

The term that describes contents that are so low in combustibility that self-propagating fires cannot occur is "low hazard contents." This classification indicates that the materials present pose minimal risk of ignition or fire spread due to their inherent properties, making them quite safe in terms of fire hazard.

Low hazard contents typically include materials that either do not burn or do so extremely slowly, and as a result, they do not contribute to the propagation of fire. This understanding is critical for fire inspectors and safety professionals when assessing potential fire hazards in various environments. Additionally, recognizing what constitutes low hazard contents helps in establishing appropriate safety measures and fire prevention strategies in buildings and facilities.

In contrast, ordinary hazard and high hazard contents denote materials with greater combustibility or that may contribute to more severe fire conditions, while combustibles are a broader category that includes all materials that can catch fire, without specifying the degree of hazard they present.