What is the maximum curvature radius for straight conduit before needing to use manufactured bends?

The maximum curvature radius for straight conduit is critical because exceeding this radius can lead to issues such as excessive stress on the cables running through the conduit or difficulties in pulling cables. When the bend radius is too tight, it can risk damaging the insulation or functionality of the cables. The established maximum for conduit is typically governed by industry standards and best practices, which aim to ensure both safety and performance.

In this case, the maximum curvature radius of 12 meters is generally consistent with the guidelines provided in standards documents, which help designers make informed decisions regarding conduit installation to avoid any cable stress or potential breakage. Proper adherence to these radii helps maintain the integrity of the electrical or fiber optic systems housed within the conduits, ensuring longer system life and reliability.

The other values, while they may seem plausible, fall outside this specific guideline and may not be supported by standard engineering practices, which guide the design of efficient and safe outside plant installations.