What standard is used to determine the non-combustibility of an assembly or material?

The correct standard for determining the non-combustibility of an assembly or material is CAN-ULC S114. This standard outlines the test method for assessing the non-combustibility of building materials and assemblies in Canada. It specifically evaluates the performance of materials when exposed to fire and is integral for ensuring that materials meet safety requirements in construction.

CAN-ULC S114 is important for establishing that materials do not contribute to the spread of fire, thus playing a critical role in maintaining safety in building design and construction. This standard is often referenced in the National Building Code of Canada, making it highly relevant for architects and building professionals.

Other options, while relevant to fire testing, focus on different aspects. For example, ASTM E84 is used for testing surface burning characteristics of building materials, not specifically for determining non-combustibility like CAN-ULC S114 does. NFPA 701 is concerned with the flammability of textiles and films, and ISO 5660 deals with the reaction to fire tests of building products. Therefore, CAN-ULC S114 is the appropriate choice for assessing non-combustibility.