Fault Managed Power: Answering the Questions Everyone is Asking

As interest in Fault Managed Power (FMP) grows, so do the questions. That's a good thing.

New technologies should be scrutinized. Engineers, consultants, contractors, and technology leaders should challenge assumptions, ask hard questions, and demand evidence before adopting anything new.

Recently, many of those questions surfaced in response to a popular technology podcast discussing FMP. The comments reflected curiosity, skepticism, and healthy debate – everything from safety concerns and copper usage to questions about standards, complexity, and whether the technology solves a real problem.

Here, we address some of the most common questions.

 

Q: Isn't this just a solution looking for a problem?

A: Short answer: No.

The challenge isn't powering laptops, phones, or today's conventional network devices. The challenge is delivering significantly more power across greater distances safely without requiring traditional electrical distribution methods.

Today's buildings are adding an increasing number of intelligent, connected devices:

• AI-enabled cameras
• Building automation systems
• Digital signage
• Smart lighting
• Occupancy sensors
• Wireless access points
• Edge computing equipment
• Security systems

Many of these applications require more power than traditional PoE can deliver. Or they need that power delivered farther than Ethernet distance limitations allow.

Panduit developed its Fault Managed Power System (FMPS) to close that gap. It fills the space between low-power data networking technologies and conventional electrical infrastructure, enabling higher-power applications while leveraging familiar structured cabling practices.

The question isn't whether power needs are growing – they are. Driven by AI-powered computing, rapid data center expansion, building electrification, and the continued growth of connected devices, the demand for power is accelerating at an unprecedented pace. The real question is whether the infrastructure within our buildings is evolving quickly enough to support these growing power requirements.

Fault Managed Power helps bridge the gap, providing a more flexible way to distribute power where traditional approaches become costly, complex, or difficult to scale.

 

Q: Why not just use AC power? We've done it successfully for over 100 years.

A: The answer to this is twofold: First, building requirements have changed.

AC power remains essential and isn't going away. FMP isn't designed to replace every AC circuit in a building. It's designed to provide another option where traditional methods create limitations.

Modern connected infrastructure increasingly requires:

• Distributed power
• Remote devices
• Faster deployment
• Easier reconfiguration
• Greater visibility and control

In many applications, centralized power architectures provide advantages that conventional branch circuit distribution cannot.

Second, labor shortages are making it harder to find enough qualified electricians to support the installation and upkeep of AC power delivery. The issue isn’t a lack of skilled electricians; it’s that demand is outpacing the available workforce. In the United States, there was a shortage of more than 94,000 electricians in 2025. This number is expected to grow. Grid modernization and electric vehicle infrastructure alone will require 80,000 new electricians each year through 2030, according to the US Bureau of Labor Statistics Occupational Outlook and the NECA workforce report.

Because FMPS can be installed and managed by low-voltage contractors, adding FMPS where possible helps alleviate some of the problems associated with the shortage of electricians.

This isn't an "AC versus DC" debate. Modern buildings will use both. The goal is to select the right technology for the application, not forcing every application into the same model.

 

Q: Isn't DC power more dangerous than AC power?

A: Safety is one of the most common concerns, and one of the biggest misconceptions. Multiple commenters questioned how a system operating at voltages above traditional extra-low-voltage thresholds could be considered “touch safe.”

The answer lies in how Fault Managed Power works.

Unlike conventional electrical systems that continuously deliver available energy, FMP continuously monitors the circuit and manages energy flow. If the system detects a fault condition, power is interrupted before hazardous energy can be sustained.

The technology was specifically designed around safety requirements and is recognized in the National Electrical Code through Class 4 power systems.

That safety architecture is the foundation of the technology – not an afterthought.

In other words, the system isn't considered safe because it uses DC. It's considered safe because of how it manages and protects the flow of energy.

 

Q: How is "touch safe" actually achieved?

A: That's an important technical question.

Fault Managed Power systems use active monitoring and fault detection to ensure power is only delivered when operating conditions remain within defined parameters. The system continuously verifies circuit integrity and responds to abnormal conditions extremely quickly.

The result is a power delivery system designed to prevent sustained hazardous energy exposure.

Importantly, the safety architecture is independently validated. Panduit’s FMPS is UL listed and SIL-3 certified, providing third-party verification that the system can reliably detect faults and respond appropriately to maintain safe operation.

For many people, this represents a shift in thinking. We've spent decades defining safety primarily by voltage levels. FMP introduces a different approach: managing available fault energy rather than relying solely on voltage limitations.

That's why understanding the technology requires looking beyond traditional voltage-based comparisons.

 

Q: Doesn't this require more copper and larger cables?

A: The short answer is no.

Any power distribution system involves engineering tradeoffs among distance, power level, efficiency, cable size, and installation methods. Traditional AC installations require cables between 14AWG and 6 AWG, depending on the power required and the distance from the branch circuit. In most FMPS installations, substantial amounts of power are delivered over smaller 16AWG cables that contain less copper. To put actual numbers to it, the difference between 1,000 feet of 3-pair 10AWG cable and 1,000 feet of 3-pair 16AWG cable is more than 700 pounds of copper.

However, cable size alone doesn’t tell the whole story.

When evaluating infrastructure, it's important to look beyond a single component and consider the complete system:

• Electrical distribution equipment
• Conduit
• Branch circuits
• Labor requirements
• Space utilization
• Future scalability
• Ongoing moves, adds, and changes

The most meaningful comparison is total installed infrastructure, not simply conductor diameter.

Many organizations find value in the flexibility gained through centralized power architectures and structured cabling approaches, particularly as buildings become more connected and dynamic.

 

Q: Doesn't this create proprietary lock-in?

A: It's a fair question.

The reality is that Fault Managed Power is not simply a product. It is a recognized power classification defined within industry codes and standards frameworks.

As with any emerging technology, ecosystem growth is important. Adoption increases as manufacturers, technology providers, consultants, contractors, and building owners gain experience and confidence in deployment.

The long-term success of FMP will depend on interoperability, continued development of global standards, and broad industry participation, not on vendor exclusivity.

That's true of every successful infrastructure technology.

 

Q: Is this replacing PoE?

A: No.

One of the most common misconceptions is that FMP is trying to replace Power over Ethernet.

It isn't.

PoE remains one of the most successful infrastructure technologies ever introduced, commonly powering everything from wireless access points and security cameras to intelligent building systems and connected devices. It excels at powering network-connected devices and will continue to play a critical role for years to come.

The real opportunity lies in understanding how PoE and FMP complement one another.

Think of it this way:

• PoE is ideal for many endpoint devices.
• FMP extends power delivery capabilities for applications that require more power, longer distances, or centralized energy distribution.

For many buildings, the future isn't PoE or FMP.

It's PoE and FMP. (For more information on how FMP and PoE work together, see the ICT Today article, How FMP and PoE are Rewiring the Modern World.)

 

Q: Is FMPS compatible with common networking equipment?

A: Yes. FMPS is designed to work alongside existing network infrastructure, extending power delivery where PoE alone may not meet distance or power requirements.

For example, Panduit and Cisco have developed a Cisco-validated architecture that combines FMPS with Cisco’s Catalyst 9300 PoE switching platform. The implementation guide demonstrates how the two technologies can work together as part of a smart building architecture.

 

Q: Why would a building owner care?

A: Building owners ultimately care about outcomes, not technology labels.

They want infrastructure that helps them:

• Deploy systems faster
• Adapt spaces more easily
• Reduce disruption during renovations
• Support future technology growth
• Improve operational efficiency
• Simplify building management

 

As buildings continue evolving into highly connected environments, power distribution becomes increasingly strategic.

The conversation isn't about whether FMP is technically interesting.

The conversation is whether it helps organizations build more adaptable, intelligent, and resilient facilities.

That's the real measure of success.

 

Q: Is FMP mature enough for real-world use?

A: Skepticism around market readiness for any new technology is understandable.

The best way to evaluate maturity is through standards development, code recognition, industry investment, and successful deployments.

Fault Managed Power has moved beyond theoretical discussions. In addition to code recognition and safety certifications, the technology is now supported by NECA 726, the industry’s installation and maintenance standard for Class 4 Fault-Managed Power systems. The existence of dedicated design and installation guidance is another indicator that FMP has evolved into a practical, deployable infrastructure technology.

Like many transformative technologies, adoption will not happen overnight. But that doesn't mean the need has not already emerged.

 

The Bottom Line

Every meaningful innovation faces skepticism.

Structured cabling did.

Power over Ethernet did.

Wireless networking did.

Cloud computing did.

The questions being asked about Fault Managed Power are exactly the questions that should be asked. They help separate hype from substance and ensure new technologies earn trust through performance, safety, and real-world results.

The most productive conversation isn't whether Fault Managed Power replaces existing technologies.

It's how FMP expands what's possible.

Because as buildings become smarter, more connected, and more power-intensive, the demand for new approaches to power distribution will only continue to grow. And that's the problem Fault Managed Power was designed to solve.

Learn more about Fault Managed Power.