Busbar Trunking System: Complete Guide

A practical guide to busbar trunking system types, components, applications, installation and project selection.

What Is a Busbar Trunking System?

A busbar trunking system, also commonly called a busway system, is a prefabricated electrical power distribution system that uses enclosed conductors to transmit and distribute power between major electrical equipment and downstream loads. Compared with conventional cable routing, it provides a more structured and modular power distribution route.

A typical system may follow this path:

Transformer → LV Switchgear → Main Busway → Plug-in / Rising Main Busway → Plug-in Box → Distribution Board / Electrical Load.

Different projects may use different busway types. Compact busway is intended for compact high-current distribution, feeder busway for power transmission between major distribution points, plug-in busway for flexible branch distribution, and rising main busway for vertical distribution in multi-storey buildings.

A complete system can include straight sections, connectors, elbows, starting sections, terminal covers, expansion sections, plug-in boxes, spring supports and other accessories.

Busbar trunking systems can be applied in data centers, factories, high-rise buildings and commercial buildings.

Frequently Asked Questions

1. Is a busbar trunking system the same as busway?
Yes. The terms are commonly used for enclosed bus conductor systems used for electrical power transmission and distribution.

2. Can busbar trunking be used vertically?
Yes. Rising main busway is designed for vertical distribution in multi-storey buildings.

3. Can it use copper or aluminum conductors?
Yes. Yongjin’s YJC compact busway documentation includes both copper and aluminum conductor configurations.

4. Can busway connect to transformers and switchgear?
Yes. Starting and connection sections can be engineered for transformer and LV switchgear interfaces.

5. What information is needed for quotation?
Useful information includes the SLD, layout, rated current, route, equipment information and project specification.

Related Busway Knowledge

What Is a Busway System? →
Busway vs Cable →
What Is Compact Busway? →
What Is Feeder Busway? →
What Is Rising Main Busway? →

Need a Busbar Trunking Solution?

Send Yongjin your SLD, layout, rated current, route, equipment information and project specification for preliminary review and quotation support.