Which of the following materials can raceways be made from to ensure fire resistance?

Raceways that are designed to provide fire resistance are typically constructed from materials that can withstand high temperatures and do not easily combust. Steel is a favored choice because it retains its structural integrity under high heat and is not prone to burning. Certain fire-resistive plastics are engineered to resist ignition and slow the spread of fire, making them suitable for applications where fire safety is a concern.

Using a combination of steel and specially formulated plastics allows for the creation of raceways that not only protect the wires within them but also contribute to the overall safety of an electrical installation. This is crucial in environments where fire hazards may be present.

In contrast, materials like wood and fiberglass may lack the necessary fire resistance properties. While aluminum and copper are excellent conductors of electricity, they are not inherently fire-resistant. PVC and rubber also do not provide the necessary properties for fire resistance, making them less suitable for raceways when fire safety is a priority. Therefore, the combination of steel and specific fire-resistive plastics stands out as the correct choice.