When pulling three conductors cables into a raceway, jamming may occur when the ratio of the inside diameter of the raceway to the outside diameter of the cable is in the range of?

The correct answer is based on the standard practices and guidelines set forth for pulling multiple conductors through a raceway. When pulling three conductor cables, the risk of jamming occurs when the ratio of the inside diameter of the raceway to the outside diameter of the cable falls within the range that can lead to excessive friction and difficulty in movement.

In the case of the selected option, a ratio of 2.8 to 3.2 indicates a specific range where the diameter of the conduit is designed to allow sufficient space for the conductors to be pulled without excessive resistance or the possibility of jamming. This ratio is aligned with industry standards that take into account factors such as the number of conductors, their diameter, and the bending radius.

When conductors are tightly packed in a raceway, particularly in larger setups where there are multiple cables, maintaining an appropriate diameter ratio is crucial to ensure smooth installation and to minimize wear and damage to the cables. A ratio that is too low may lead to increased friction, while a ratio that is too high could indicate a loose fit, which poses its own risks.

Understanding this ratio is important not just for avoiding installation difficulties, but also for complying with electrical codes and ensuring the longevity of the cabling