Which guideline should be followed for the conductors' size in a multi-raceway situation?

In a multi-raceway situation, it is essential for the sizing of conductors to be determined by the total circular mil area. This method ensures that the conductors can safely handle the total electrical load being carried through all of the raceways without overheating or causing disruptions in the electrical system.

When calculating the conductor size, the total circular mil area accounts for the cumulative capacity that all conductors in the multiple raceways must support. This approach promotes safety and efficiency by ensuring that conductors are neither oversized, leading to unnecessary expenses, nor undersized, which poses safety risks due to potential overloads.

Using this guideline supports the overall effectiveness of grounding and bonding practices by reinforcing the need for an accurate and safe conductor sizing methodology, thus providing a reliable electrical system within multi-raceway applications.