Which wiring method requires the least attention to fire safety in air-handling spaces?

The choice of metal raceways as the wiring method that requires the least attention to fire safety in air-handling spaces is grounded in the properties of the materials used and how they interact with fire. Metal raceways, such as conduits and metallic enclosures, offer better fire resistance and containment of heat compared to nonmetallic options.

In air-handling spaces, the potential for fire spread is a critical concern because these areas often facilitate the movement of air throughout buildings, which can assist in the rapid spread of flames and smoke. Metal raceways provide a physical barrier that can help prevent the ignition of surrounding materials. They also do not produce toxic fumes as some nonmetallic materials might do upon burning.

Additionally, in fire incidents, metal raceways are less likely to fail structurally than nonmetallic methods, which could lead to circuit failure or ignition of flammable materials. While it is essential to ensure that all wiring methods are installed according to stringent fire safety codes, metal raceways are generally considered more robust and less prone to unforeseen fire-related issues in air-handling areas. This is why they require comparatively less attention to fire safety than other wiring methods.

In contrast, options that involve nonmetallic materials or flexible metal conduit under