What condition should exist for cables entering conduits to avoid damage?

For cables entering conduits, utilizing fittings is essential to ensure that the cables are protected from potential damage. Fittings, such as connectors, bushings, or conduit bodies, help to provide a smooth transition for the cables into the conduit, which minimizes the risk of abrasion or snagging at the entry point. These fittings are designed to accommodate the size and type of cables being used, ensuring that they fit securely and without strain, which is critical for maintaining the integrity of the cable insulation and overall performance.

While insulation, proper securing of cables, and color-coding are important considerations in other contexts of wiring and installation, they do not specifically address the physical protection and structural integrity of the cables as they enter the conduit. Proper fittings directly serve to safeguard the cables from environmental factors, mechanical stress, and accidental damage, which is why this condition must be met for the safe installation of cables into conduits.