What is busduct? A practical guide to busbar trunking systems

Busduct — sometimes called busbar trunking or busway — is a prefabricated electrical distribution system that uses copper or aluminium conductors enclosed in a metal housing. Where traditional cabling needs trays, glands, terminations and a lot of installation time, busduct ships as standardised lengths and joints that bolt together on site.

On a high-rise tower or a large industrial plant, that prefabrication translates into faster installation, predictable performance, and a much smaller cross-section than the equivalent cable run.

How it works

Inside the housing, copper or aluminium bars carry current along the length of the duct. Flexible joints connect adjacent sections; tap-off boxes draw power off at intermediate points without breaking the run. The whole system is engineered as a single low-impedance path, which keeps voltage drop and thermal losses tightly controlled.

Where busduct makes sense

Busduct comes into its own anywhere you need to move significant power over a defined route — typically rising mains in a tower, distribution to large machinery, or feeders between substation and switchgear.

• Commercial and residential high-rises
• Hospitals and healthcare campuses
• Data centres and hyperscale facilities
• Industrial plants and process facilities
• Hotels and large hospitality developments

What to specify

Beyond the obvious — current rating, conductor material and IP rating — the specifications worth scrutinising are short-circuit withstand, temperature rise at ambient (50°C in the GCC), fire performance and the standards the system has been tested against. KEMA, ASTA and UL testing to IEC 61439-1 and IEC 61439-6 are the benchmarks worth insisting on.

How Al Sanaya can help

We're the authorised partner for Linkk and Megaduct busduct across the GCC and the wider MENA region. We can engineer the layout, supply the system from authorised manufacturing, and commission it on site — all under one roof.