B2B OEM Technical Guide
USB Trunking System Office Guide: Power Every Desk, Zero Clutter
Complete guide for office furniture specifiers on USB trunking system integration and EU compliance.
What Is a USB Trunking System? Office Power Done Right
The average six-person bench desk in a European office runs eighteen charging cables — three per person. At least four of those touch the floor. A USB trunking system brings that number to zero. Most office managers have never specified one.
This guide explains what a USB trunking system is, why it outperforms power strips on cost and safety, how installation works in a day, and who should specify one.
What Is USB Trunking?
A USB trunking system for office use is a modular power channel that runs along desk edges, partition rails, or wall surfaces. It integrates USB charging ports — typically USB-A and USB-C — directly into the office furniture structure. Clean infrastructure, no clutter: that is the core advantage of this approach.
Think of it as a raceway with two jobs. The channel houses cables inside a clean enclosure. It also delivers power through built-in USB sockets spaced along the run. You tap into charging at any point without adding separate adapter plugs.
A typical unit consists of three main components:
The trunking channel — a rigid or semi-flexible enclosure that mounts to a surface and routes the internal wiring
USB charging modules — snap-in or slide-in socket units with USB-A or USB-C ports rated between 12W and 65W per port
A mains connection point — a single hardwired or plug-in feed that supplies the entire run
The result is a single infrastructure channel that can serve four, eight, or twelve workstations from one power feed, with no trailing leads on the desk surface.
Why USB Trunking Beats Traditional Power Strips
The traditional answer to office charging needs is a cluster of power strips and wall adapter blocks. This approach has three weaknesses. A modular trunking channel eliminates all three.
Each adapter brick creates its own cable run to the device. In a six-person bench desk setup, that means up to eighteen cables on or around the desk surface. The trunking channel routes all internal wiring inside the enclosure, so the only cable the user sees is the one from their device to the nearest USB port.
Standard power strips chain multiple sockets over a single cable run. Under heavy load — six laptops at 45W each — voltage at the far end drops by 3 to 5 percent. A properly rated trunking bus conductor maintains consistent output across all ports.
Stacked adapters and overloaded extension leads are among the top causes of office electrical fires in EU workplace safety reports. A single, properly rated mains connection eliminates the daisy-chain risk and simplifies the electrical installation record for facilities managers.
How USB Trunking Works in Practice
Installation varies by product type, but the core process follows four steps:
Surface Mounting
The trunking channel is fixed to the rear edge of the desk, the underside of an overhead panel, or a partition wall. Most channels clip or screw into place and accept standard 19mm or 25mm fixing hardware used in office furniture assembly.
Mains Connection
A single power feed connects to one end of the run. Depending on the installation, this is a hardwired spur from a wall outlet or a standard 13A plug feed for retrofits. The internal bus then carries the mains voltage along the full channel length.
Module Insertion
USB charging modules slot into the channel at any position. Most installations in office environments use tool-free snap-in modules. The facilities team repositions ports as layouts change — a key advantage where desk configurations shift quarterly.
Device Connection
Users plug directly into the USB-C or USB-A ports on the modules. USB-C ports on quality systems support Power Delivery (PD) up to 65W, which is sufficient to charge a 13-inch laptop at full speed. USB-A ports typically deliver 12W to 18W, suitable for smartphones and tablets.
In a real-world example: a twelve-metre bench run with eight workstations needs one mains feed, eight modules, and zero additional adapters. One electrical connection in the compliance log instead of eight.
Internal engineering cross-section of a USB trunking system module.
Who Should Use USB Trunking?
This type of power infrastructure delivers the most value in three specific places:
Open-plan offices with bench desking benefit most from this approach. A shared desk surface needs one power channel for all seats. Individual adapter stacks take up space and create clutter. A four-seat bench desk saves about 1.2 metres of cable per workstation with an integrated trunking solution.
Co-working spaces and hot-desking facilities. Desk layouts in flexible offices change three to four times per year. Modular trunking channels reposition without tools. Fixed wall sockets cannot do this.
Conference and meeting rooms. A channel along the table edge gives USB-C charging at every seat without pop-up units that break the table surface. CBRE's 2024 European Office Fit-Out Cost Guide lists integrated desk-level USB charging as a standard line item in Tier 2 office builds — it is no longer an upgrade.
Home offices also benefit. A USB trunking system on the desk edge of a standing desk absorbs the height-change movement cleanly, eliminating the loose cable problem that plagues height-adjustable setups.
GLOB-EL's USB trunking modules are designed for direct integration into standard office furniture channels. Each module delivers USB-C Power Delivery at up to 65W alongside USB-A at 18W — from a single snap-in unit that replaces the adapter stack on any desk.
All units carry CE marking under LVD 2014/35/EU; for a detailed breakdown of the IEC certification requirements that underpin that compliance, see our EU rocker switch panel OEM IEC certification guide for furniture manufacturers.
For single-workstation home office setups, compare our USB desk socket buying guide for home office, and explore our full USB socket range for furniture integration.
USB Trunking vs Socket vs Pop-Up: Which Fits Your Office?
When specifying integrated USB charging for office environments, the decision usually comes down to three formats. Here is how they compare:
| Format | Best For | Max USB-C Output | Repositionable? |
|---|---|---|---|
| USB Trunking | Long bench desks, open-plan offices | 65W per port | Yes — tool-free modules |
| In-Desk USB Socket | Individual workstations, home offices | 65W per port | No — fixed installation |
| Pop-Up Power Module | Conference tables, reception desks | 45W per port | No — recessed mounting |
| Wall USB Socket | General room charging, hotel rooms | 30W per port | No — hardwired |
Choose by whether charging needs to follow users across a shared desk run. For two or more workstations on the same desk surface, trunking almost always costs less to install and performs better than any fixed-point alternative.
Frequently Asked Questions About USB Trunking
Here are the most common questions buyers ask when planning office power infrastructure with integrated USB charging.
Does a USB Trunking System in the Office Require an Electrician?
In EU member states, the mains connection point of any USB trunking installation must be made by a qualified electrician under Low Voltage Directive 2014/35/EU. Failure to comply invalidates building insurance and employer liability cover under EU Workplace Safety Directive 89/391/EEC. In the UK, this falls under Part P of the Building Regulations.
The trunking channel and module insertion is non-electrical assembly — handled by furniture installers. Budget 1 to 2 hours of electrician time per run for the mains spur connection.
Can I Expand a USB Trunking System? Office Upgrades Made Easy
Yes. That is one of the primary advantages of modular design. New modules insert into any slot without rewiring. Check that the total power draw of added modules does not exceed the rated capacity of the trunking bus — typically 13A or 16A depending on the system specification.
What is the difference between USB-A and USB-C in trunking modules?
USB-A ports deliver 12W to 18W — adequate for smartphones and earbuds, not for laptops. USB-C ports with Power Delivery reach 45W to 65W, enabling laptop charging from the trunking run.
As of 2024, over 80 percent of new business laptops sold in the EU ship with USB-C as the primary charging port (IDC European Tracker Q3 2024). GLOB-EL Technical Team recommends specifying at least one USB-C PD port per seat in any new office trunking installation.
How long can a single USB trunking run be?
Most commercial runs are rated up to 3 metres from a single mains feed. A 12-metre bench desk serving eight workstations needs four feed points spaced every 3 metres — plan for one electrical spur per 3-metre segment. GLOB-EL's modules are rated for four modules per 13A feed, delivering up to 260W per segment before load reduction applies.
Is USB trunking safe to use with laptops?
Yes, provided the USB-C module is rated for the wattage your laptop requires. A 65W PD module safely charges any laptop drawing 65W or less — most 13-inch and 14-inch models. Laptops above 65W should use a mains socket instead.
Transform Your Office Power Infrastructure
Ready to deploy a USB trunking system in your office or furniture project? GLOB-EL supplies USB trunking modules for office integration and in-desk USB sockets for European office furniture. Contact our team for specifications and pricing.
