The electrical industry, once again, is in flux. Modern buildings are becoming increasingly connected to everything. Security cameras, access control systems, lighting, and a whole host of wireless access points are all pivotal connectivity points in the modern home and office. One of the important technologies lodged at the centre of this shift is Power over Ethernet (PoE).
PoE allows data and electricity to be delivered through the same network cable. There is no need to install separate power supplies or connections for compatible devices, a single Ethernet connection is capable of providing both.
Whilst PoE is not a sparkling new technology fresh from the lab, its growing use makes it increasingly relevant to electricians and contractors. This is reflected in the IET Wiring Regulations latest update. This introduces a dedicated section covering PoE.
What is Power over Ethernet?
Simply put, PoE allows compatible devices to receive electrical power through their network2 connection. This is widely in use already for CCTV cameras, IP phones, among other network devices. As smart technology becomes more common the range of applications is expanding rapidly.
For electricians, this means the traditional distinction between electrical and data infrastructure is becoming much less straightforward.
A device that perhaps once required a dedicated electrical supply may now be powered through a telecommunications cable. And it’s not just the installation process that needs to be considered. This creates new considerations when systems are being designed and tested.
Why does PoE matter to electricians?
PoE is becoming more powerful and significantly more widespread. For this alone, PoE should be of interest to electricians.
As the amount of power delivered through network cabling increases, cable selection, heat build-up, and cable grouping need assessing. The IET’s guidance specifically highlights considerations around cable ratings, heat, and installation methods.
This is where electricians need to start taking PoE very seriously.
It is no longer simply a matter of installing a cable and allowing the IT contractor to manage everything else. Electricians increasingly need to understand the ways in which these systems interact with the installation as a whole. It is also prudent to note what requirements apply to them.
A growing role in smart buildings
PoE also fits neatly into the wider move towards smarter buildings.
Modern lighting systems, sensors, security equipment, and other connected technologies are becoming smarter and more sophisticated. Using network infrastructure to provide both connectivity ad power simplifies installation and provides greater flexibility when equipment needs upgrading or relocating.
For commercial buildings, this creates significant opportunity for contractors such as Maintenance Services Electrical, who understand conventional installations and emerging technologies alike.
Any future electrician will not simply be installing sockets, circuits, and distribution boards. They will find themselves working alongside connected systems that combine power, data, and intelligent control.
What does BS 7671 Amendment 4 mean?
The introduction of Section 716 is significant here. It formally recognises PoE within the Wiring Regulations.
These updated regulations address the distribution of extra-low-voltage DC power through telecommunications cabling. PoE is thusly brought into the regulatory framework, highlighting the need to consider these systems during design, installation, and verification.
Amendment 4 was published in April 2026. The previous version of BS 7671 remains valid during the transition period but is due for withdrawal on October 15th, 2026.
That gives electricians a clear reason to familiarise themselves with the new requirements now rather than waiting for the withdrawal of the older edition.
The changing role of the electrician
PoE is a singular example of how quickly electrical installations are currently evolving.
Electricians are working more with EV charging, Solar PV, Smart technology, and energy management systems. The boundaries between electrical, data, and comms infrastructure are becoming blurred.
PoE is therefore about more than another section in the Wiring Regulations. It is an indication of where the industry is heading.
For electricians, understanding these technologies now will make it easier to adapt as connected electrical systems become an increasingly normal part of modern buildings.
Share this post: