Rising Mains / Bus Ducts (SW/Conventional)

When large amounts of power need to travel through a building efficiently and safely, bus ducts and rising mains are usually the answer. Aeropack Infra offers bus ducts and rising boards in a wide range of capacities, designed for both indoor and outdoor installation — including phase-segregated and non-segregated metal-enclosed bus ducts, and super-compact sandwich-type bus ducts. These systems distribute power vertically through multi-storey buildings and horizontally across large floors with lower losses and greater flexibility than conventional cabling.

A rising main carries power up through the floors of a building, with tap-off points at each level that feed the local distribution. Compared with banks of cables, a bus-duct rising main is more compact, easier to tap into, and capable of carrying very high currents in a controlled, well-protected enclosure. For commercial towers, hospitals, malls and industrial buildings, it is often the most practical and reliable way to move power where it is needed.

Systems we offer

• Phase-segregated metal-enclosed bus ducts
• Non-segregated metal-enclosed bus ducts
• Super-compact sandwich-type bus ducts
• Vertical rising mains with tap-off points
• Horizontal power distribution runs
• Indoor and outdoor rated systems
• A wide range of current capacities
• Tap-off boxes and accessories

Choosing the right type

The right bus-duct system depends on the application. Sandwich-type bus ducts are compact and have low impedance, making them ideal for high-current vertical risers where space is tight. Non-segregated ducts suit many general distribution needs, while phase-segregated ducts provide additional protection against phase-to-phase faults for the most critical or highest-capacity runs. We help you select the type, rating and configuration that match your loads, your building and your budget.

Flexibility through tap-offs

One of the great advantages of a bus-duct rising main is the ease of adding or relocating loads. Tap-off boxes can be installed at predetermined points along the run, letting you draw power for a new floor, tenant or load without disturbing the rest of the system. This makes bus ducts especially valuable in buildings where the distribution of loads is likely to change over time.

Installed and tested to standard

Bus ducts carry high currents, so correct installation and testing are essential. We install with proper support, alignment and jointing, test the system before energising, and document the configuration for your records. Properly installed, a bus-duct rising main is a robust, low-maintenance backbone that serves a building reliably for its whole life.

If your project needs to move significant power vertically or horizontally with flexibility for the future, talk to our engineers about the right rising-main or bus-duct solution.

Power distribution without the cable clutter

In a large or tall building, distributing high currents through banks of cables quickly becomes bulky, lossy and hard to modify. Bus ducts and rising mains solve this elegantly: a compact, well-protected enclosure carries very high current through the building, with tap-off points where power is drawn off cleanly at each floor or zone. The system is more compact than equivalent cabling, easier to tap into, and built to handle the heat and forces that large currents create.

Flexible for a changing building

One of the great strengths of a bus-duct rising main is how easily it adapts. Tap-off boxes can be added or relocated at predetermined points to feed a new tenant, floor or load without disturbing the rest of the system. In buildings where the distribution of loads changes over time — commercial towers, hospitals, malls and industrial premises — this flexibility is invaluable and saves considerable disruption and cost down the line.

Installed and tested for a long life

Because bus ducts carry high currents, correct support, alignment, jointing and testing are essential. We install to standard, test before energising and document the configuration, so the rising main becomes a robust, low-maintenance backbone that serves the building reliably for its whole life. We help you choose the type and rating — segregated, non-segregated or compact sandwich — that best fits your needs.