Reduced Installation Costs In a traditional AC build, every endpoint – every light, every sensor, every camera – requires a licensed electrician to run armored cable (BX or Romex) to a junction box. With FMP and PoE, much of this work falls under the umbrella of low-voltage or limited energy installation. This lowers labor costs and simplifies the supply chain. One can run Category 6 or specialized FMP cables instead of heavy copper and steel conduit. Labor content is reduced because the safety performance of limited-energy technologies makes rigid pathways, such as conduit, optional. Energy Efficiency and the DC-to-DC Advantage Most of our modern devices (e.g., computers, LED lights, servers, and sensors) run natively on DC power. In a traditional building, we take AC from the grid and use power bricks (i.e., transformers) at every device to convert it back to DC. Each conversion loses 10-20 percent of the energy as heat. By delivering DC power directly through ICT infrastructure, conversion losses are eliminated. When scaled across a 50-story building, the energy savings are massive, contributing directly to LEED certification and environmental, social, and governance (ESG) goals. PRACTICAL IMPLEMENTATION: STRATEGIES FOR THE MODERN ENGINEER Transitioning to an FMP/PoE-centric design requires a shift in mindset. Here are the core strategies for successful implementation in the 2026 landscape: 1. Convergence at the Planning Stage The facilities and IT departments can no longer operate in a vacuum. Since the power for the lights is now coming from the same closet as the Wi-Fi access points, the architectural phase must include a unified infrastructure plan. 2. Heat Management in Cable Bundles One of the most critical technical challenges is the thermal rise within cable bundles. When running 90 W PoE or FMP through a bundle of 48 cables, the core of that bundle gets hot. Engineers must reference the new 2026 NEC tables to determine the maximum bundle size allowed based on the
3. Futureproofing : The Code now better accounts for cabling density. As we pack more power- carrying data cables into tight trays, heat dissipation becomes a factor. The 2026 update provides more sophisticated ampacity tables specifically for bundle sizes common in PoE lighting and FMP deployments. To truly appreciate why the 2026 NEC reorganization is such a pivotal moment for the industry, one can look at the physics of safety. Historically, the NEC categorized circuits based on how much damage they could do if something went wrong. The move to the 2026 edition (and the full integration of Article 726 concepts into the broader Article 725/722 ecosystem) marks the transition from “inherent safety” (Class 2) to “active safety” (Class 4).
protocol. The transmitter sends tiny pulses of energy to the receiver. If those pulses are not returned exactly as expected – indicating a short, a ground fault, or a human body touching the line – the system shuts down within a fraction of a second. The Technical Edge : Because Class 4 can operate at much higher voltages (up to 450 V), it suffers far less voltage drop over long distances compared to Class 2. This enables the ability to power a Wi-Fi access point, for example, at the end of a 1,000 ft (305 m) hallway using thin 18 AWG copper, whereas Class 2 would struggle to reach 300 ft (91.5 m) without substantial power loss. WHY THE 2026 REORGANIZATION IS THE FINAL PIECE Before the 2026 NEC update, Class 4 was often treated as an experimental or special category. The 2026 NEC moves these requirements into a unified framework. 1. Unified Terminology : By adopting the term "Limited-Energy Cables," the Code acknowledges that whether running a 10 W sensor or a 500 W
cable’s temperature rating and the ambient environment.
3. Decentralized Power Architecture FMP allows power sources to move closer to the edge. Instead of one massive electrical room in the basement, FMP allows digital power hubs that are distributed throughout the building. These hubs take high-voltage FMP to power PoE switches supplying local devices, reducing line loss and increasing system resilience. THE ROAD AHEAD: A SMARTER, SAFER GRID Looking toward the end of the decade, the integration of FMP and PoE can be expected to accelerate. We are moving toward software-defined power, where a facility manager can reconfigure the power layout of an entire floor with a few clicks of a mouse, rather than a month of electrical rewiring. The 2026 NEC has laid the groundwork. The technology is here. The cost savings are proven. For the engineers and installers on the front lines, the message is clear: the future of power is not just about how much energy we can move – it is about how safely and intelligently we can manage it. AUTHOR BIOGRAPHY : Bob Voss is a distinguished engineer in Panduit’s Corporate Research & Development organization. He facilitates breakthrough technologies through standards leadership and regulatory strategy, serving key roles in NFPA-70, NEMA, TIA, and IEEE 802.3. He also serves as chairman of the board for the FMP Alliance. REFERENCES: • National Fire Protection Association. NFPA 70: National Electrical Code, 2026 Edition . • IEEE Std 802.3 Standard for Ethernet 2022
THE TECHNICAL BREAKDOWN: CLASS 2 VS. CLASS 4
While both Class 2 and Class 4 power are now grouped under the limited-energy umbrella in the 2026 Code, their internal logic is fundamentally different. CLASS 2: THE SAFETY OF LOW LIMITS Class 2 has been a reliable workhorse for decades. Its technical ceiling is 100 VA. The reason is simple: at 100 W or less, the risk of a resistive fault (like a loose wire) getting hot enough to ignite common building materials is statistically negligible. Because the energy is inherently limited, the NEC allows for much more relaxed installation methods. Class 2 cables can share the same trays as data lines, and in many cases, a conduit or specialized grounding is not necessary. It is a definitive example of plug- and-play safety. CLASS 4: THE INTELLIGENCE OF FAULT MANAGEMENT Class 4 is the new frontier. Unlike Class 2, which says, "no more than 100 W," Class 4 says there can be, for example, 2000 W, but only if the system is smart enough to manage it. Under the 2026 NEC, Class 4 systems must meet UL 1400-1 standards. These systems utilize a handshake
FMP light fixture, the installation practices (support, separation from high voltage, and firestopping) are now largely harmonized.
2. Cable Independence : The new Article 722 acts as a one-stop shop for all limited-energy cabling. This eliminates the confusion where an installer had to flip between three different articles only to determine if it is acceptable to put two different types of cable in the same junction box. 3. Hazard vs. Power : The Code now distinguishes between "Power-Limited" (Class 2, 3) and "Fault- Managed" (Class 4). This allows engineers to design systems that have the power density of traditional electrical work with the safety and speed of low-voltage cabling. THE ECONOMIC ENGINE: WHY DC IS WINNING THE OFFICE Beyond the safety and regulatory benefits, the move toward limited-energy technologies is driven by cold, hard math.
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ICT TODAY
April/May/June 2026
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