A Comprehensive Guide to Tray Cable

Written By: LAPP Tannehill

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What is tray cable? See how tray cable can be versatile in many applications with tray cable types: WTTC/Direct Burial (ITC), PLTC, VNTC, and XHHW. Find out what's right for your use case.

What is tray cable?

Tray cable is a widely used type of multiconductor or multipair cable approved for installation in cable raceways and cable trays.

According to the NEC (National Electric Code), tray cable is defined as “a factory assembly of two or more insulated conductors, with or without associated bare or covered grounding conductors under a nonmetallic sheath, for installation in cable trays, in raceways, or where supported by a messenger wire.”

Since cable trays do not fully enclose cables, which would be the case with cable raceway or ducts, tray cable must conform to strict requirements to reduce the risk of mechanical damage and the resultant fire hazard that could exist. As a result, tray cable can be very durable and versatile in many environments.

Some general characteristics of tray cable include:

• Can be used indoors or outdoors
• Is sunlight, heat, and moisture resistant and adheres to UL specifications.
• Available in 300V and 600V variations that are tested to flammability standards.
• Can be used in direct sunlight or buried/underground applications (with the correct ratings)
• Will work even if exposed from conduit to equipment
• Must be supported every six feet
• Must meet applicable exposed-run requirements

What makes a tray-rated cable different from a standard multi-conductor?

Tray cables are high-quality cables that have been tested rigorously and can also possess armor over individual conductors for superior insulation and a robust jacket that can withstand heavy abrasion.

Tray cables also pass stringent impact and crush tests per UL and do not require the use of conduit. This lowers installation and maintenance costs, while also making routing during installation quicker and easier.

When and where should you use a tray-rated cable?

Tray cables are a versatile cable with broad usage wherever installation within cable trays or raceways is required.

Common applications include control, power, signal, instrumentation or lighting and tray cable is found across many industrial situations including industrial plant expansions, food & beverage processing plants including brewery applications, automotive plants, wind energy, machine tool, forestry equipment, oil and petrochemical equipment, cold temperature storage and packaging facilities, processing equipment, and more.

Common Tray Cable Types: Type TC, Type PLTC, Type ITC and Type WTTC

The most common UL cable types for usage in cable trays are as follows:

Type TC: UL Power and Control Tray Cable

Type TC Power and Control Tray Cable are commonly used industrial-grade tray cables commonly found in industrial control systems, petrochemical facilities, and other industries such as metals/mining and pulp/paper.

Link to Hongrui Technology

Article 336 of the National Electrical Code (NEC or ANSI/NFPA 70) defines Type TC tray cable which is typically rated to 600V, though V and V are also available.

Type TC tray cable can be utilized in control applications, feeder lines and branch circuits and common use-cases such as control, power, lighting, signal circuitry and Class 1 hazardous circuits. 

The two most common types of Type TC Tray Cable are VNTC (Vinyl Nylon Tray Cable) and XHHW (Cross-linked polyethylene High Heat-resistant Water-resistant Tray Cable).

Optional Tray Cable Ratings: -ER (Exposed Run), Direct Burial, Sunlight Resistance and Oil Resistance

In addition to the main UL tray cable types of -TC, -PLTC, -ITC and -WTTC there are several additional optional ratings that may be application to one or more of the main designators.

Tray Cable Manufacturers and Applications

Tray cable is widely used across a broad spectrum of industrial applications and is designed and manufactured by most of the leading global cable manufacturers including Alpha Wire, General Cable / Prysmian, LAPP and Southwire amongst many others.

For further information the various types of high performance, flexible, oil-resistant industrial tray cables for power, control and signaling applications please reference our Industrial Tray Cable Solutions reference for additional selection guidance.

Tray Cable Pricing

LAPP Tannehill continues to nurture healthy relationships with our manufacturers and suppliers to provide you with a range of tray cable pricing that fits within your budget.

Brian Arickx, Director of Supply Chain at LAPP Tannehill, says, “As always, the purchasing team at LAPP Tannehill is doing everything in their power to buy all products at the best possible cost for our customers. One luxury of distribution is we have the oversight of 250 manufacturing partners, allowing us to see trends and easily compare cost options across the industry.”

Choosing Wisely: The Ultimate Buyer's Guide to Light Duty Cable Trays

Posted on: 15/12/

Introduction 

Cable management plays a crucial role in maintaining a seamless and efficient network. One often-overlooked component that deserves careful consideration is the light-duty cable tray. These trays are the unsung heroes of cable organization, providing support and protection for cables while ensuring easy access for maintenance and upgrades. In this comprehensive buyer's guide, we will explore the key factors to consider when choosing light-duty cable trays, helping you make an informed decision that aligns with your needs. 

Understanding Light-Duty Cable Trays 

Before delving into the selection process, it's essential to understand what light-duty cable trays entail. Light-duty trays are designed for applications with moderate cable loads, making them suitable for environments with fewer cables and lighter equipment. They are commonly used in commercial buildings, data centres, and other spaces where cable management is critical. 

Material Matters 

The first consideration in your buying journey is the material of the cable tray. Light-duty trays are typically available in materials like aluminium and steel. Aluminium trays are corrosion-resistant and lightweight, making them an excellent choice for indoor applications. On the other hand, steel trays provide robust support and are suitable for outdoor use but may be heavier. 

Design and Construction 

The design of a cable tray significantly impacts its functionality. Opt for trays with a ladder design, as they offer better cable ventilation, reducing the risk of overheating. The rungs or side rails should be sturdy and well-spaced to provide ample support. Additionally, check for trays with a solid bottom or perforated design, depending on your specific cable management requirements. 

Load Capacity 

Assessing the load capacity of a cable tray is crucial to ensure it can accommodate your current and future cable needs. Light-duty trays are designed for moderate loads, so it's essential to calculate the weight of the cables they will support. Consider factors such as the weight of the wires, any additional equipment, and the distance between supports to determine the appropriate load capacity for your application. 

Corrosion Resistance 

Choosing a cable tray with proper corrosion resistance is paramount in environments with moisture or corrosive elements. Aluminium trays inherently resist corrosion, making them suitable for indoor spaces. If your application requires outdoor installation or exposure to harsh elements, opt for steel trays with a corrosion-resistant coating. 

Installation and Maintenance 

Look for cable trays that facilitate easy installation and maintenance. Quick and straightforward installation can save both time and labour costs. Consider trays with pre-drilled holes, easy-to-use accessories, and detailed assembly instructions. Also, choose trays that allow easy cable access, simplifying maintenance and future upgrades. 

Compliance and Certifications 

Ensure that the cable trays you choose comply with industry standards and regulations. Look for certifications such as NEMA (National Electrical Manufacturers Association) or UL (Underwriters Laboratories) to guarantee that the trays meet the required safety and performance standards. 

Cost Considerations 

While cost is a significant factor, it should not be the sole determining factor in your decision. Consider the overall value offered by the cable tray, considering factors such as material quality, design, load capacity, and durability. Investing in a high-quality cable tray may result in long-term cost savings through reduced maintenance and improved cable management. 

FAQs: 

What is the primary purpose of a light-duty cable tray? 

Light-duty cable trays provide support and organization for cables in environments with moderate loads, ensuring efficient cable management and easy access for maintenance. 

Why is material selection crucial when choosing a cable tray? 

The material of the cable tray determines its characteristics, such as corrosion resistance and weight. Aluminium is ideal for indoor use, while steel offers durability for outdoor applications. 

How do I calculate the load capacity needed for my cable tray? 

Calculate the weight of your cable's additional equipment, and consider the distance between supports. Choose a cable tray with a load capacity that comfortably exceeds this calculated weight. 

Why is corrosion resistance significant in cable trays? 

Corrosion resistance is crucial, especially in environments with moisture or corrosive elements. It ensures the longevity of the cable tray, preventing degradation and maintaining performance. 

What certifications should I look for when purchasing a cable tray? 

Look for certifications such as NEMA or UL to ensure that the cable tray complies with industry standards for safety and performance, providing peace of mind in your purchase. 

Conclusion 

Selecting a suitable light-duty cable tray is a critical step in ensuring the efficiency and longevity of your cable management system. By considering factors such as material, design, load capacity, corrosion resistance, ease of installation, compliance with standards, and overall cost, you can make an informed decision that aligns with the unique needs of your application. Remember, cable trays are not just a passive component; they are integral to the seamless functioning of your network infrastructure. Choose wisely, and your cable management system will thank you with years of reliable service. 

If you want to take a closer look at our range of Light-Duty Cable Trays, click here. If you want to contact or find out more about this blog posts author, Dave Dann, click here.  Related Products Previous Post

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