DATA CENTRES
Data centres and the challenge to power the digital age
The digital revolution is driving unprecedented demand for data centres, facilities that have become the backbone of our connected world. From streaming services and e-commerce platforms to cloud computing, artificial intelligence and remote working, nearly every industry relies on the efficient and uninterrupted operation of these critical infrastructures. None of this would be possible without highly specialised electrical systems, writes Phil Wiltshire, contracts manager for Pensdown, the electrical people
D
ata centres are essentially the physical hubs where computing, networking and storage resources converge to manage, process and distribute digital information.
They house critical hardware, including servers, storage arrays, switches and routers, all operating in a highly controlled environment to ensure reliability and longevity. These facilities are far more than just “server rooms” - they are engineered ecosystems, where power, cooling, connectivity and security must work in perfect harmony.
The scale of data demand is staggering. Global data usage is projected to surpass 200 zettabytes by the end of 2025, creating an enormous burden on the infrastructure that supports our digital lives. As demand grows, data centres must be resilient, scalable and efficient. For facilities managers and electrical contractors, this means understanding and delivering highly specialised systems that can cope with enormous power loads, complex redundancy requirements and the ever-present need for operational reliability.
Designing for zero downtime
In the world of data centres, even a few minutes of downtime can cost millions of pounds and have significant reputational consequences. This makes the design of redundant electrical systems a critical priority. At its simplest, redundancy means having multiple layers of backup power to ensure continuous operation. Uninterruptible power supplies (UPS) form the first line of defence, providing immediate, short-term power in the event of a failure. They bridge the gap between utility outage and the activation of secondary systems such as diesel or natural gas generators, which can sustain operations for extended periods. Some high- specification data centres also incorporate dual utility feeds from separate substations, ensuring that if one supply line fails, the other can seamlessly take over without disruption. Redundancy is more than just power generation. Power distribution units (PDUs) and switchgear are designed to distribute electricity efficiently across the facility while supporting phased expansions. Flexible PDUs allow load balancing and rapid reconfiguration, enabling data centre operators to add new racks, upgrade server density, or accommodate higher-power equipment without compromising uptime. Electrical engineers must anticipate these future demands during the design phase to avoid costly retrofits or operational bottlenecks. Data centre growth is exponential. As the volume of data continues to surge, facilities need to grow without major overhauls that could disrupt operations. Electrical systems play a central role in this scalability, from supporting higher-density racks to enabling modular expansions. High-voltage distribution systems, combined with intelligent power monitoring, allow operators to manage energy consumption across growing infrastructures efficiently.
Servers also generate significant heat during operation, making cooling systems essential to maintain optimal operating conditions. Traditional air-cooling methods can consume as much energy as the servers themselves, raising operational costs and increasing carbon footprints. As a result, data centre operators are
increasingly adopting energy-efficient cooling strategies. Liquid cooling, for instance, transfers heat directly from server components using specially engineered fluids, reducing reliance on air conditioning and enhancing thermal management. Hot and cold aisle containment
20 BUILDING SERVICES & ENVIRONMENTAL ENGINEER JANUARY 2026
separates warm and cool airflows to maximise efficiency, while innovations in free cooling, where external air is used when conditions permit, can significantly cut energy use.
Power demands and electrical infrastructure
As already demonstrated, data centres are among the largest consumers of electricity, with some facilities drawing as much power as a small city. This makes the design, installation and management of electrical systems both critical and complex. High-voltage distribution is often employed to reduce losses and manage large-scale power efficiently, while low-voltage distribution ensures safe and reliable delivery to individual racks and devices.
Electrical contractors must also consider
harmonics, voltage stability, and phase balancing to avoid disruptions caused by high- density equipment. Continuous monitoring and predictive maintenance of transformers, switchgear and UPS units ensure long-term reliability and operational safety. Furthermore, electrical systems must meet both local and international regulations, while physical and network security protect both infrastructure and the sensitive data contained within. Redundant circuits, fire suppression systems and emergency shutdown procedures are standard requirements.
This means that electrical engineers working in this environment must understand not only the technical requirements of high-power installations, but also the broader regulatory and operational context. This includes IEC standards, ISO certifications and local building regulations, ensuring that every installation meets or exceeds industry expectations. The evolution of technology continues
to reshape data centre electrical design. Renewable energy integration, advanced energy storage and microgrids are becoming commonplace to enhance sustainability and resilience. Intelligent algorithms now optimise
energy use, adjusting loads across servers, cooling systems and lighting to achieve maximum efficiency without compromising uptime. Moreover, modular and containerised data centres allow rapid deployment and relocation, requiring electrical systems to be flexible and easily integrated into existing infrastructure. Hybrid power solutions that combine mains, batteries and renewable sources offer both resilience and environmental benefits.
The role of electrical expertise
The complexity, therefore, of modern data centres makes electrical expertise indispensable. From designing redundancy and scalable distribution to integrating energy-efficient cooling and managing future expansion, the role of electrical engineers underpins the success of these facilities. Precision, planning and technical foresight are essential to ensure uninterrupted operation, to reduce energy costs and support sustainable growth.
Expert electrical contractors bring this knowledge to every project. They can anticipate potential failures, optimise power distribution and implement best-practice safety and maintenance regimes. This proactive approach mitigates risk, enhances reliability and allows operators to focus on their core business. As data volumes continue to grow, the need for innovative, reliable and sustainable electrical solutions has never been greater. By combining technical expertise with a strategic approach to resilience and energy efficiency, electrical contractors ensure that data centres meet today’s needs and are prepared for tomorrow’s challenges.
At Pensdown, our experience in commercial electrical installations allows us to deliver data centre projects that are robust, future-ready and energy-conscious. Through meticulous planning, high-quality materials and rigorous adherence to standards, we help ensure that the digital age is powered reliably, efficiently and sustainably.
Read the latest at:
www.bsee.co.uk
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36
