Which tool is primarily used for cutting wires and cables that are often difficult to reach?

The correct tool for cutting wires and cables that are often difficult to reach is diagonal cutting pliers. These pliers are specifically designed for cutting wire and can access tight spaces, making them ideal for situations where maneuverability is limited. The angled cutting edges of diagonal cutting pliers allow for precise cuts, especially in awkward angles or confined areas, which is a common requirement in electrical work.

Ratcheting cable cutters are powerful tools generally used for cutting larger cables, such as those used in electrical distribution systems. While they excel in cutting thicker cables, they are not meant for intricate or tight spaces due to their size and mechanism. Pulling tapes are used for pulling wire through conduit and do not serve a cutting function, while poly lines, which are often used for navigation in pulling wires or for other purposes, also do not provide cutting capabilities.

Thus, the unique design and functionality of diagonal cutting pliers make them the best choice for cutting wires in challenging locations.