The NEC limits you to 360 degrees of total bends (e.g., four 90-degree turns) between pull points. If you have many bends, a larger conduit size reduces the friction that can snap wires.
This report provides a comprehensive overview of electrical conduit sizing systems used in residential, commercial, and industrial installations. It aims to clarify the relationship between trade size, actual dimensions, applicable standards (NEC, UL, ANSI), and factors influencing proper conduit selection. conduit sizes
Conduit is referred to by its "Trade Size," which is a nominal identifier. It is important to note that the The NEC limits you to 360 degrees of total bends (e