Low-voltage busbar location

Low-voltage busbars are installed inside switchboards, busbar trunking systems, or under raised floors, depending on the application and building layout.

Switchboard Installation

In low-voltage switchgear, the main busbar distributes power horizontally between switchboard columns and can be installed at the top, middle, or bottom of the switchboard depending on design, customer specifications, and local practices. Distribution busbars connect to the main busbar and supply outgoing devices, ensuring safe and efficient power distribution within the assembly. Proper installation includes securing the busbar, providing internal partitions to prevent direct contact, and grounding for safety against indirect contact.

Busbar Trunking Systems

Busbar trunking systems are commonly used for power distribution over large areas, such as factories, offices, or multi-story buildings. They can be installed vertically, horizontally, or in combination, forming a continuous power distribution path. Tap-off units are connected at defined intervals along the trunking to draw power without isolating the entire system.

This setup allows flexibility for future modifications and reduces installation time compared to traditional cabling.

Underfloor Office Applications

In office environments, low-voltage busbars are often installed under raised access floors to supply power to floor boxes beneath desks and workstations. The busbar tracks, typically made of copper and housed in metallic trunking, carry power from the building's mains supply to multiple outlets. Tap-off units allow electricity to branch off at specific points, providing modular and easily adjustable power distribution.

Key Considerations

Safety: Busbars must be enclosed or partitioned to prevent direct contact and properly earthed to avoid electrical hazards. Thermal Management: Adequate spacing and material selection ensure heat dissipation and prevent overheating. Accessibility: Placement should allow for maintenance, expansion, and connection of tap-off units without disrupting the entire system.

In summary, low-voltage busbars are installed inside switchboards, along busbar trunking runs, or under raised floors, with the exact location determined by the type of installation, safety requirements, and ease of access for power distribution and maintenance.