What type of electrical wiring can burn and is considered hazardous?

Combustible electrical wiring is considered hazardous because it is made from materials that can catch fire and burn when exposed to heat, electrical faults, or high currents. Such wiring can significantly increase the risk of electrical fires, especially in environments where high temperatures can occur or where there is a possibility of physical damage to the wires.

In contrast, non-combustible electrical wiring materials are designed to resist burning, providing a safer option for electrical installations. Armored electrical wiring is typically used to protect against physical damage but does not inherently imply that the materials used are combustible; it focuses more on structural protection. Insulated electrical wiring is designed to prevent electrical shocks and contain the electrical current without allowing for conductivity through the outer surface, and while it is safer than combustible types, it may not necessarily prevent fire if the insulation itself is made from combustible materials.

The understanding of these types highlights the importance of using appropriately rated and non-combustible materials in electrical installations to mitigate fire hazards.