Which of the following is a key feature of metallic raceways?

Metallic raceways are widely recognized for their durability and grounding capabilities, making them well-suited for a variety of electrical applications. The intrinsic strength of metal provides excellent protection for the wires housed within the raceway, guarding them against physical damage. This durability ensures that the raceway can withstand environmental challenges such as moisture, temperature fluctuations, and mechanical impacts.

Additionally, metallic raceways facilitate effective grounding, which is crucial for electrical safety. Grounding helps prevent electrical shocks and reduces the risk of fire by providing a path for fault currents to safely dissipate. This safety feature is particularly important in installations where there is a possibility of electrical faults.

Given these characteristics, metallic raceways stand out in the electrical industry due to their robustness and ability to enhance the safety of electrical installations. The other options do not match the core strengths of metallic raceways; for instance, flexibility and lightness are more associated with non-metallic options, while inexpensive installation may not accurately reflect the initial costs associated with metallic materials.