FEATURE their shelf environment carefully – and both approaches are acceptable. Generally what matters is investing in that architecture which requires having the right cabinet, busbar, and power shelves needed while being comfortable with safety and easing into it.
This is where Legrand can assist – our trusted advisors work with clients to understand their needs and deliver the right solutions required for their business. Our on-hand product suite allows customers to visualise test and evaluate what is best for them. For customers who aren’ t yet comfortable or fully on board our mission is to help them understand the technology and review it together.
As racks incorporate more PDUs higher-current busbars and denser power layouts what new challenges emerge in physically integrating that much power into a single rack?
The busbars in a typical high-density application are around 70-80 lb. They are also located at the back of the cabinet where it ' s very crowded. So it becomes a form of architecture – planning the design engineering it and then producing the solution. It’ s all planned, tested, and integratedtogether to make sure it works from the cabinet all the way through to the power. Every setup is different whether it’ s PDUs busbars power shelves or anything else; it’ s about making sure your solution works in your specific data centre.
High-voltage DC: The next frontier for AI racks
High-voltage DC is rapidly moving from niche discussion to mainstream strategy in AI-driven data centres. As rack densities climb beyond 100 kW and approach 150 kW and above, traditional AC distribution models are being stretched to their limits.
Hyperscalers are already operating at ± 400 V DC, with some architectures moving towards 0 – 800 V DC. The direction of travel is clear: higher voltages, fewer conversion stages and improved efficiency at scale.
However, adoption is not just about performance. Operators must consider safety, compliance, monitoring and workforce readiness. Engineering teams need new skill sets, revised protection schemes and cabinet-level integration strategies that account for heavier busbars and stacked power shelves.
The evolution towards 1,500 V DC may not happen overnight, but the groundwork is being laid today. Organisations investing in adaptable cabinets, scalable busbar systems and ORv3-ready infrastructure will be better positioned to transition as standards mature.
Looking ahead what should operators prioritise now to ensure their rack power infrastructure can scale with next-generation AI hardware and increasing density?
Thanks to AI, densities are going to continue to increase. Everybody loves to talk about when there ' s going to be a one-megawatt rack but we ' ll see. If you aren’ t utilising AI you will most definitely fall behind because its value is already paying off. I believe people were a little unsure when they looked at some of the expenditures and the investments hyperscalers were making but that should now be a thing of the past and business leaders should be in full implementation stage.
I also believe high-voltage DC is going to continue to evolve with power sidecars and cooling sidecars. I mentioned 0-800 earlier but I think high-voltage DC will likely get up to 1500. So I think it’ s about embracing what’ s to come and being prepared for even greater power shifts.
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