How long must each loop or coil of unbroken conductor within a box be to be counted twice in box fill calculations?

In the context of box fill calculations, the length of each loop or coil of unbroken conductor must be a minimum of 12 inches to be counted twice. This requirement is essential because it allows for adequate space and heat dissipation within the electrical box, ensuring safe and effective operation of the electrical systems.

When the length of a conductor loop or coil exceeds 12 inches, it can be counted as an additional conductor for the purposes of box fill calculation. This practice helps to maintain the integrity of the box fill limit established by applicable electrical codes, which are designed to keep wiring installations safe and prevent overheating or overcrowding.

Understanding this regulation is crucial for anyone working with electrical systems to ensure that they adhere to code requirements, apply proper safety measures, and optimize the design of electrical installations for both performance and safety.