For a raceway system, what is generally the main reason for considering wall thickness?

The primary reason for considering wall thickness in a raceway system is to enhance mechanical strength. The wall thickness of a raceway affects its durability and ability to withstand physical stresses, such as impact and environmental conditions. A thicker wall can provide better protection for the conductors inside from external forces and potential damage, ensuring the integrity of the electrical system over time.

While accommodating conductor size, improving insulation resistance, and reducing installation costs are all important factors in the overall design of electrical systems, they are not the primary reasons for selecting the wall thickness of a raceway. The focus on mechanical strength ensures that the raceway can endure wear and tear, supporting a safe and reliable installation.