Busbar Trunking

Busbar Trunking System

The busbar trunking system distributes power through compact sandwich-type conductors, providing an alternative to parallel cable runs in commercial buildings and industrial facilities. Copper or aluminium conductors are housed in an extruded aluminium-alloy enclosure, with listed current ratings from 400 to 6,300 A. The rated operating voltage is AC 380 V, with a rated insulation voltage of 690 V.

Suitable for vertical risers and plant distribution routes, the system supplies multiple loads through tap-off points along the busway. Enclosure options from IP40 to IP65 accommodate different installation environments, while the route, bends, joints and tap-off positions are configured to suit the building layout and connected loads.

Technical Specifications

Rated Operating Voltage	AC 380 V
Rated Insulation Voltage	690 V
Rated Current	400 ~ 6300 A
Conductor Material	Copper / Aluminium
Enclosure Material	Extruded aluminium alloy, electrophoretic-anodised
Insulation Material Class	Class B (130 °C) insulation film
Enclosure IP Rating	IP40–IP65 (by configuration)
Standards	GB 7251

Key Features

High current density, compact sandwich design.
Flexible tap-off for distributed loads.
For high-rise buildings, data centers and plants.
Fire-resistant options available.

Typical Applications

Chemical and metallurgical plants
Airports, railway stations and exhibition halls
High-rise buildings and shopping centres

Installation & Aftercare

Prepare the site, plan routine checks and keep service records.

What needs to be ready before installation?

Survey bends, floor penetrations and terminal positions before ordering; straight sections alone do not define the installed route.
Keep joints and tap-off units accessible, and specify supports and floor fire-stopping for the building layout.
Avoid roof leaks and pipe condensation; choose enclosure protection for the route and reserve space for future tap-offs.

What should operators check during routine rounds?

During rounds, look for water staining, damaged covers and unusual heating indications at joints or tap-off boxes.

What is covered during planned maintenance?

At planned isolation, qualified personnel inspect joints, insulation and supports, remove dry dust and check specified joint fastening.
Arrange qualified thermal surveys under representative load; investigate changing hot spots, moisture ingress or discoloured connection parts.

Customization Options

Define the electrical configuration and the details needed for your site.

Conductor & current: Copper or aluminium conductor; specify load current, diversity and the required short-circuit duty.
Route & connections: Straight lengths, bends, floor penetrations, expansion joints and transformer or switchboard connections.
Tap-off arrangement: Tap-off locations, outgoing circuit ratings and space for future connection points.
Enclosure & installation: IP40–IP65 by configuration; mounting orientation, support positions and floor fire-stopping interfaces.

Project-specific options and accessories are confirmed in the quotation and approved drawings.