Most wire or string is made with a circular cross section of some particular radius and diameter. The area of that cross section is the well known A = pi*R² which is colloquially pronounced as “pie ...

When installing conductors of different sizes (or types of insulation) in a raceway, you can’t size the raceway based on Tables 1 through 12 in Annex C. You must instead follow this three-step process ...

If raceway is too small, you can damage conductors while trying to pull them through. Even if they aren’t damaged during the pull, they may overheat inside an undersized raceway. For these reasons, ...