When planning a commercial electrical or structured cabling project, one major decision can significantly influence both compliance and budget: should you install tray cable in mesh cable trays or pull cables through conduit?  

This decision is not merely a matter of preference; it has far-reaching implications for the efficiency and effectiveness of the project. Traditionally, conduit has been the go-to solution for many electricians and contractors, owing to its long-standing reputation for durability and protection. However, in recent years, wire mesh cable trays have emerged as a compelling alternative, particularly for commercial, industrial, and smart building applications.  

The growing popularity of mesh trays can be attributed to their numerous advantages, which include reduced labor costs, faster installation times, and a more straightforward pathway to ensuring compliance with the National Electrical Code (NEC). This is especially true for power and control cable systems, where proper installation and management of cables are critical to the overall performance of the electrical system. 

Key Takeaways 

  • Tray cable in mesh trays reduces labor compared to conduit. 
  • Conduit requires more time, materials, and pulling effort. 
  • Tray-rated power and control cables simplify NEC compliance. 
  • Mesh trays allow easier expansion and maintenance. 
  • Open design improves airflow and cable longevity. 
  • Mesh trays are cost-effective for commercial installations. 

Understanding the Difference: Tray Cable vs. Conduit 

Conduit Systems 

Conduit installation is a critical aspect of electrical work, and it involves the careful running of cables through various types of conduits to ensure both safety and functionality. The most common conduits used in this process include Electrical Metallic Tubing (EMT), PVC conduit, and rigid metal conduit, each serving distinct purposes based on the environment and specific requirements of the installation. EMT is often favored for its lightweight nature and ease of installation, while PVC conduit is typically used for underground applications due to its resistance to moisture and corrosion. Rigid metal conduit, on the other hand, provides superior protection, especially in settings where physical damage is a concern.  

Tray Cable in Mesh Cable Trays 

Tray cable systems are a highly efficient and versatile solution for managing electrical wiring in various environments. These systems utilize open wire mesh trays, which allow for excellent airflow and heat dissipation, reducing the risk of overheating and ensuring optimal performance. The use of tray-rated power and control cables is essential, as these cables are designed to withstand the rigors of being laid in these trays without the need for additional protection. This not only simplifies installation but also helps in maintaining the integrity of the cables over time. Proper grounding and bonding practices are critical components of tray cable systems, as they help prevent electrical faults and ensure safety for both equipment and personnel.  

Why Mesh Cable Trays Reduce Labor Costs 

1 Faster Installation 

Conduit installation is a crucial process in electrical work that involves several key steps to ensure proper functioning and safety. First, it requires precise measuring and cutting of pipes to fit specific dimensions and meet the layout needs of the project. Bending conduit is another important task, as it allows for smooth transitions around corners and obstacles while maintaining the integrity of the electrical system.  

  1. Fewer Pulling Complications

Long conduit runs in electrical installations can often present a range of challenges that require careful planning and execution. When dealing with these extensive runs, it is common to need multiple technicians to ensure that the installation is completed efficiently and safely.  

  1. Easier Adds, Moves & Changes

Conduit systems can pose significant challenges when it comes to future expansion and adaptability. These rigid structures are often designed for a specific set of cables and connections, which can make it cumbersome to add new lines or modify existing ones as technology evolves or business needs change. 

NEC Compliance Considerations 

Both systems are required to adhere to the National Electrical Code (NEC) requirements, which serve as a critical framework for ensuring safety and efficiency in electrical installations. However, when it comes to cable tray systems, they often provide a more straightforward path to achieving compliance.  

The NEC Article 392 specifically governs the use of cable trays and lays out clear guidelines for installing tray-rated cables. By following these guidelines, installers can effectively streamline the process, minimizing potential issues that might arise from non-compliance.  

This is particularly beneficial in complex installations where space and organization can become a challenge. To ensure that the installation of tray cable systems is both safe and compliant, several key practices must be followed. First and foremost, bonding the tray sections is crucial for maintaining a continuous electrical path, which helps mitigate the risk of electrical faults.  

Finally, utilizing only approved tray-rated cable types is imperative, as these cables are specifically designed to withstand the unique conditions present in tray systems, thereby enhancing the overall reliability of the installation.  

Power & Control Cables (Primary CTA Focus) 

Tray systems are specifically engineered to accommodate tray-rated power and control cables, making them an excellent choice for various electrical applications. These systems provide a robust and organized method for managing and supporting cables, ensuring safety and efficiency in installations. Tray-rated power cables are designed to be used in conjunction with these systems, facilitating the seamless distribution of electrical power across different components within a facility. Their versatility allows them to support a wide range of applications, including electrical distribution, panel feeds, and connections for network equipment. 

Control Cables 

Control cables play an essential role in a variety of applications across multiple industries, serving as the backbone for systems that require reliable communication and power distribution. In HVAC systems, these cables facilitate the connection between thermostats, sensors, and control units, ensuring that temperature regulation is both efficient and effective. Building automation systems utilize control cables to integrate lighting, climate control, and security features, allowing for seamless operation and enhanced energy management.  The 16 AWG Twisted Pair 300V PLTC Tray Cable, for example, is designed to handle both power and signal transmission while maintaining resistance to electromagnetic interference, thanks to its overall foil shielding.  

When Conduit May Still Be Required 

A conduit may be necessary in a variety of specific situations to ensure both safety and compliance with local regulations. For instance, in hazardous locations, where the potential for explosive atmospheres exists, the use of conduit is essential to protect electrical wiring from damage and to minimize the risk of ignition. Similarly, areas that are prone to physical damage, such as manufacturing floors or construction sites, often require conduit to safeguard electrical installations from impacts or other mechanical hazards.  

On the other hand, for interior commercial and industrial installations, mesh trays are frequently the more efficient and practical option. These trays provide a lightweight, versatile solution for managing and supporting wiring while allowing for easy access for maintenance and modifications. The open design of mesh trays facilitates better airflow around cables, reducing the risk of overheating and improving overall system performance. 

Why Mesh Cable Trays Are Preferred on Modern Job Sites 

Wire mesh trays have become an essential component in modern electrical and data organization systems, particularly due to their numerous advantages that contribute to NEC (National Electrical Code) compliance. These trays facilitate faster installation, allowing contractors and technicians to complete projects more efficiently, which is crucial in today’s fast-paced construction environments. The design of wire mesh trays also significantly reduces labor costs, as they are lightweight and easy to handle, making them simpler for teams to install compared to traditional conduit systems. Furthermore, the flexibility of wire mesh trays allows for easy field modifications, enabling quick adjustments to layout changes or expansions without major disruptions to the installation process.  

ShowMeCables offers a full range of network connectivity and infrastructure solutions for small and medium-sized businesses. In addition, our customer-focused approach includes a same-day shipping policy and U.S.-based customer service support.  Questions? Please call us at +1 (866) 545-8420, email us or visit our contact page.   

Frequently Asked Questions 

Is tray cable cheaper than conduit? 

Yes, in many commercial applications, tray cable systems reduce labor and material costs. 

Does NEC allow tray cable instead of conduit? 

Yes, when tray-rated cables are used, and installations meet NEC Article 392 requirements. 

Are mesh cable trays grounded? 

Yes. Metallic trays must be bonded and grounded per NEC standards. 

Can Ethernet cables run in mesh trays? 

Yes, when properly rated and separated from power cables. 

The debate between tray cable and conduit systems often comes down to efficiency and cost-effectiveness on job sites. Mesh trays offer a practical solution by simplifying installation and reducing labor costs, allowing electricians to focus on other critical aspects of a project. While both options have their merits, the flexibility and ease of maintenance provided by mesh trays make them a compelling choice for modern electrical installations.