What is the primary purpose of an anchor strap in raceway installations?

The primary purpose of an anchor strap in raceway installations is to secure raceways to walls or ceilings. This is critical for ensuring that the raceways are properly supported and aligned, which helps maintain the integrity of the electrical system. When raceways are adequately anchored, it prevents movement that could lead to damage or issues with the electrical conductors housed within them. Proper installation of raceways not only enhances safety but also complies with electrical codes and standards that dictate how raceways must be supported throughout their length.

The other options do not accurately reflect the function of an anchor strap. For instance, while insulation and weight considerations are important in electrical installations, they are not related to the role of an anchor strap. Similarly, the installation of raceways may involve the use of tools, and an anchor strap itself does not play a role in expediting installation speed.