Why is it essential to calculate conduit fill?

Calculating conduit fill is crucial primarily to ensure that the conduit does not become overloaded. When a conduit is filled beyond its capacity, it can lead to overheating of the wires inside due to insufficient airflow and increased resistance. This overheating can result in electrical failures, damage to the insulation of the wires, and potentially pose fire hazards. By adhering to appropriate fill limits, safety is prioritized, ensuring that the electrical system operates reliably and effectively.

While other factors like cost, ease of installation, and aesthetics may have their own importance, they do not directly influence the functional safety and operational integrity of the electrical system in the way that proper conduit fill does.