What is the typical installation setup for overhead secondary mains?

The typical installation setup for overhead secondary mains involves using vertical racks. This configuration is often employed to support and securely mount the conductors, allowing for proper alignment and spacing between the wires to minimize interference and maintain safety standards. Vertical racks provide stability and ensure that the electrical lines are elevated above ground level, which is vital for preventing accidental contact and reducing weather-related damages.

In contrast, horizontal beams may not offer the same advantages for overhead installations since they can introduce more challenges in terms of wind and ice loading, as well as clearance issues. Grounded cables are essential for safety but are not specifically related to the structure supporting overhead secondary mains. Suspended lines could refer to the conductors themselves being hung in the air, yet they lack the systematic organization and support structure provided by vertical racks. Thus, the correct setup choice is effectively encapsulated by the use of vertical racks.