What type of conduit is often required in environments that pose a risk of physical damage?

Rigid metal conduit is often required in environments that pose a risk of physical damage due to its strong and durable construction. This type of conduit provides excellent protection against impacts, abrasions, and other forms of mechanical damage that may occur in certain settings, such as industrial areas or outdoor installations. The metal material gives it superior strength compared to other types of conduit, making it a preferred choice for safeguarding electrical wiring in high-risk locations. Additionally, rigid metal conduit helps in grounding and can withstand harsh weather conditions when installed externally.

In contrast, while flexible conduit offers some level of protection and is useful in applications where movement or bending is necessary, it does not provide the same level of impact resistance as rigid metal conduit. PVC conduit, although corrosion-resistant and lightweight, is more vulnerable to physical damage than its metal counterparts. Non-metallic conduit also has limitations in environments susceptible to impacts, as it is generally less robust than rigid metal conduit. Thus, rigid metal conduit stands out as the best option for ensuring safety and reliability in physically demanding environments.