Why might a contractor choose to use metallic conduit over non-metallic?

A contractor might choose to use metallic conduit primarily for its higher mechanical protection, durability, and grounding capabilities. Metallic conduit provides enhanced strength and resistance to physical damage, making it an ideal choice in environments where the electrical wiring may be exposed to potential impacts or harsh conditions.

Furthermore, the grounding capabilities of metallic conduit are significant. Since metal can effectively conduct electricity, it provides a reliable path for fault currents, which is essential for electrical safety. This feature can reduce the risk of electrical fires and improve the overall safety of the installation.

In contrast, while non-metallic options may offer benefits like easier installation and lower weight, they typically do not match the robustness and grounding effectiveness of metallic conduits. Therefore, the durability and protective qualities of metallic conduit are critical factors that influence a contractor’s choice, especially in environments where safety and longevity of the wiring system are paramount.