The distance between each raceway entry inside a box and the opposite wall must not be less than how many times the trade size of the largest raceway during splices or pulls?

The requirement that the distance between each raceway entry inside a box and the opposite wall must not be less than six times the trade size of the largest raceway is rooted in ensuring adequate space for making splices and pulls. This distance allows for safe and efficient handling of wires and cables, reducing the risk of damage during installation or maintenance and facilitating easier manipulation of conductors.

The guidelines set forth by the National Electrical Code (NEC) are designed to accommodate not just the physical dimensions of the raceways, but also the necessary clearances needed for technical reasons, such as heat dissipation, bending radius of conductors, and prevent overcrowding. Ensuring a minimum distance of six times the trade size ensures that these factors are sufficiently considered, promoting safety and compliance with electrical standards.

This requirement reflects best practices in electrical installations, ensuring conductors can be easily managed without stressing or damaging the wiring, which is critical for maintaining system reliability and safety throughout its operational lifespan.