Dual-Listed Class 4 CL4Z/CL4P Cables: The Future of Safe & Reliable Power Delivery

Summary: Dual-listed Class 4 fault-managed power cables (CL4Z/CL4P) certified to the UL 1400-2 standard are reshaping the world of powered data cabling. Offering unmatched safety, extensive installation flexibility, and simplified inventory management, these innovative cables are proudly manufactured in the USA. Explore the technology, advantages, regulatory milestones, and FAQs that make these dual-listed cables the future of power distribution.

Are you ready for a new era in power cabling, one that promises heightened safety, simplified logistics, and expanded deployment options? Recent updates to the National Electrical Code (NEC) and revolutionary cable designs have put Dual-Listed Class 4 fault-managed power cables at the center of the conversation.

With the groundbreaking engineering and the rigorous UL 1400-2 standard, your projects can now leverage dual-listed cables that adapt to both indoor plenum and outdoor usage, safely and efficiently. But what makes these cables so unique, and why should installers, builders, and specifiers care about dual listings?

What Are Dual-Listed CL4Z/CL4P Fault-Managed Power Cables?

Dual-listed cables are specifically engineered to meet multiple safety and installation standards, making them versatile for a wide range of applications. The combination of CL4Z and CL4P ratings reflects our ability to operate safely in plenum and riser environments, as well as in outdoor wet location applications—critical for commercial, industrial, and institutional operations.

Key Features of these cables:

• Dual Compliance: CL4Z/CL4P meets both plenum and riser ratings for indoor use, as well as outdoor use, even in wet locations
• Enhanced Safety: Flame-retardant and low-smoke materials protect occupants and equipment
• High Reliability: Designed to handle advanced data transmission and power for mission-critical systems
• Broad Application: Ideal for smart buildings, IoT systems, security infrastructure, data centers, LED lighting systems, healthcare facilities, and many other applications

Why the UL 1400-2 Standard Matters

The UL 1400-2 standard sets strict guidelines for how Class 4 cables must perform under extreme conditions. By meeting this certification, Dual-Listed CL4Z/CL4P cables offer:

• Verified safety under fire conditions
• Compliance with building codes
• Confidence for contractors and engineers
• Long-term protection for end-users

This level of compliance ensures that facilities are not just meeting legal standards but exceeding them to protect lives, data, and investments.

Advantages of Power Class 4 Fault-Managed Power Technology

The shift to Power Class 4 represents a leap forward in how data is transmitted and power is delivered and managed across modern infrastructures—over longer distances than standard PoE systems.

Benefits include:

• Higher Efficiency: Reduces power loss during transmission
• Scalability: Supports expanding networks and devices over longer distances
• Cost-Effectiveness: Lowers long-term operational costs
• Safety-first Design: Built to minimize risk in critical environments

By combining performance with safety, Power Class 4 cables represent the backbone of modern data and power delivery systems.

The Role of USA Manufacturing in Cable Quality

When it comes to mission-critical infrastructure, knowing your cables are manufactured under the strictest quality controls in the USA is invaluable.

Benefits of USA Manufacturing:

• Stringent Quality Control
• Consistent Supply Chains
• Faster Customization Options
• Support for Domestic Jobs and Innovation
• No tariff concerns

Looking for a specialized design? You can Request a New Custom Cable from Remee that matches your unique project requirements.

This local manufacturing advantage ensures a higher level of responsiveness, reliability, and innovation.

Where Are Dual-Listed Class 4 Fault-Managed Power Cables Used?

These cables are designed for environments that need both high power delivery and stringent safety. Common applications include:

• Smart buildings—Delivering power to sensors, lighting, and access control systems
• Stadiums & Arenas—Managing video walls, advanced security, and large-scale A/V systems
• Healthcare facilities—Supporting life-safety systems and patient monitoring equipment
• Data centers—Server racks, cooling systems, and monitoring devices
• Industrial automation —Enabling IoT devices, robotics, and sensors

In each of these settings, downtime or safety risks are unacceptable, making Dual-Listed Class 4 Cables the superior choice.

In addition, dual-listed CL4Z/CL4P cables provide the assurance that the cable meets indoor/outdoor plenum and riser ratings in applications where the applicable standard requirement is uncertain or may change. This provides a great deal of flexibility for the system end user or installer.

Not sure which cable is best for your application? Ask an Expert and get professional guidance before making a decision that could impact performance and safety for years.

When to Choose CL4Z vs. CL4P?

Understanding the difference between CL4Z and CL4P listings is critical:

• CL4Z (Outdoor Wet Location): Best for outdoor applications
• CL4P (Plenum Rated, also suitable for CL4R): Designed for indoor plenum spaces used to circulate air, such as walls, ducts, and ceilings, and is also suitable for riser applications

Choosing the correct rating ensures compliance with building codes while maximizing safety and efficiency.

The Future of Power Delivery

As technology expands for transmitting data and delivering power within and between buildings, including 24/7 remote monitoring and energy-efficient smart grids, existing cabling solutions are being pushed to their limits. Class 4 Fault-Managed Power Cables, with dual-listing CL4Z/CL4P and UL 1400-2 certification, ensure stakeholders are not just keeping up but staying ahead.

If you’re designing a project that requires safe, efficient, and future-ready power distribution, along with flexibility in meeting applicable standards, Dual-Listed Class 4 Cables should be at the top of your list. From healthcare to smart buildings, they provide the peace of mind and reliability that modern infrastructure demands.

Discover how the right cable can elevate your project’s performance and safety by requesting information from Remee.

Remee Wire & Cable is the FIRST in the industry to have its Class 4 Fault-Managed Power Cables dual-listed as CL4Z/CL4P and certified to UL 1400-2. Get more information and spec sheets on our PowerPipe™ dual-listed CL4Z/CL4P cables, as well as other powered cable solutions.

FAQ: Your Guide to Dual-Listed Class 4 Cables

Q1: Are Dual-Listed Class 4 CL4Z/CL4P cables safe in the event of a fire?

   A: They’re certified to meet rigorous fire and smoke tests (NFPA-262), making them ideal for spaces where human safety and property protection are top priorities.

Q2: What’s the main difference between Class 2, Class 3, and Class 4 cables?

   A: Class 2 and 3 cables are power-limited for low-voltage use. Class 4 cable permits higher voltage/current thanks to fault-managed safety features enabling safer, higher-power applications.

Q3: Can I use Dual-Listed Class 4 cables for both new construction and renovations?

   A: Absolutely. Our flexibility means you can safely install them in new and existing buildings—indoor plenum and riser, and outdoors—using only one cable without juggling multiple product SKUs.

Q4: What differentiates USA-manufactured Class 4 cables from imported brands?

   A: USA manufacturing offers shorter lead times, higher quality control, and accountability to stringent standards, making it the first choice for mission-critical projects and government contracts.