Fiberglass Reinforced Plastic (FRP) cable trays have become an essential component in various industries, It has a unique combination of strength, durability, and resistance to corrosion. Whether you’re working on a large industrial project or a commercial building, selecting the right type of FRP cable tray is very important for managing the cables.
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We, Team FGPL, would like to present a comprehensive understanding of the different types of FRP cable trays and their applications, ensuring you make an informed decision for your specific needs.
The process of making FRP cable trays At FGPL is quite systematic and they are typically made from fiberglass & resins using a pultrusion process.
Unlike traditional materials like steel, FRP cable trays do not corrode, making them ideal for harsh environments.
Unlike traditional materials like steel, FRP cable trays do not corrode, making them ideal for harsh environments.
FRP cable trays have a long lifespan and require minimal maintenance, reducing the overall cost of ownership.
There are several types of cable trays, each with unique characteristics and applications. Understanding these types is essential when choosing cable trays for your specific needs.
Description and Structure
Ladder-type cable trays consist of two side rails connected by rungs at regular intervals. This design provides excellent support for heavy cables while allowing for maximum ventilation.
Ideal Applications
Ladder-type cable trays are commonly used in industrial settings where heavy cables need to be supported over long distances. They are also ideal for environments where ventilation is crucial, such as chemical plants and power stations.
Design Features
Perforated cable trays have holes or slots along the bottom and sides, allowing for better air circulation and drainage. This design helps reduce the buildup of heat and moisture around the cables.
Typical Uses and Benefits
Perforated cable trays are well-suited for commercial and industrial applications where moderate cable support and ventilation are required. They are often used in office buildings, shopping malls, and light industrial environments.
FRP cable trays offer several benefits that make them an attractive choice for various applications. These benefits are essential considerations when choosing FRP cable trays.
Resistant to corrosion, making them an excellent choice for environments where traditional materials might fail. This reduces the need for costly maintenance and repairs, especially in chemical plants and coastal areas.
Lightweight, making them easy to install and reducing the need for heavy support structures. This is particularly beneficial in infrastructure projects where weight is a critical factor.
Designed to withstand harsh environments and last for extended periods. They offer excellent load-bearing capabilities and can perform well in extreme temperatures, ensuring long-term reliability.
Provide electrical insulation, ensuring the safety and performance of cables and wires. This is a key benefit in applications where electrical safety is paramount.
Usage in Industrial Area
FRP cable trays are widely used in industrial settings such as chemical plants, oil refineries, and power stations. Their corrosion resistance and durability make them ideal for these harsh environments.
Usage in Office Buildings and Shopping Malls
In commercial buildings, FRP cable trays are used to support and protect electrical and communication cables. Their lightweight nature and ease of installation make them a popular choice in new construction and renovation projects.
Application in Bridges, Tunnels, and Other Critical Structures
FRP cable trays are increasingly being used in infrastructure projects, such as bridges and tunnels, where their lightweight, corrosion-resistant, and durable properties offer significant advantages over traditional materials.
Site Assessment and Layout Planning
Before installation, it is essential to conduct a thorough site assessment and layout planning to ensure the proper placement and support of the FRP cable trays. This includes evaluating the load requirements and environmental conditions.
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16 Jun 13 11:27Hi, I am involve in a project where we are running several 3 phase circuits of 33 kV using single phase conductors arranged in a trefoil formation. The cables are installed on a FRP cable ladder which is no good as a grounding conductor. The circuits lengths is around m, and all of the circuits goes from the main substation GIS switchgear to transformers 33/4.16 kV unitsubstations located around the plant.
Question: NEC requires to run a grounding conductor with every circuit. Normally the cable ladder is good enough for this. Since in this case i have an FRP cable ladder what are my alternatives?. Should I run an aditional grounding conductor for each circuit?. I understand the grounding grid is not good enough as a grounding conductor, even if all the grounding grids of the plant are joined together.
Regards,
Cristian
Replies continue below
(Electrical)
16 Jun 13 14:56According to NEC 250.4 General Requirements for Grounding and Bonding. (B) Ungrounded Systems. (1) Grounding Electrical Equipment. you have to connect the equipment non-carrying current metallic parts to the local Grounding.
But according to (4) Path for Fault Current.:
"shall be installed in a manner that creates a low impedance
circuit from any point on the wiring system to
the electrical supply source to facilitate the operation of
overcurrent devices should a second ground fault from a
different phase occur on the wiring system. The earth shall
not be considered as an effective fault-current path."
you have to install a grounding conductor along 33 kV cable on the FRP cable tray.
The grounding conductor has to withstand the Line-to-Ground-to-Line short-circuit current.
I am not sure the metallic cable tray-even aluminum made-could withstand a medium voltage system short-circuit current. Aluminum cable tray is good only up to A.-a low voltage short-circuit, may be. See NEC Table 392.60(A)
(Electrical)
(OP)
16 Jun 13 15:32Thanks 7anoter4,
The 33 kV system is resistance grounded (600 A).
Another idea, the 33 kV cables installed in the cable ladder have a screen. Can i use the screen as a grounding conductor?. In this way i dont need to run a grounding cable along the FRP ladder.
Regards?
(Electrical)
16 Jun 13 16:33Generally the higher the voltage, the lower the fault current. 40kA is real easy to achieve at 480V, but rather rare in the 15kV range. Getting above 40kA at 115kV requires lots of sources.
(Electrical)
17 Jun 13 10:07In my opinion, it is permitted according to NEC art.250.190 Grounding of Equipment.(C) Equipment Grounding Conductor. (2) Shielded Cables.:"If the cable assembly is suitably rated for the ground fault current and is of the concentric neutral type, the shield conductors shall be permitted as the equipment grounding conductor."NEC Table 250.122 for Rating or Setting of Automatic Overcurrent Device in Circuit Ahead of Equipment, Conduit, Not Exceeding 600 A recommends 1 awg [83.69 kcmil] copper conductor cross section.See[for instance ] some concentric neutral cables:
(Electrical)
17 Jun 13 13:20I have to mention since the shield is grounded at both ends the losses of circulating current induced in the shield requires cable derating. However, you can reduce this current by cross bonding and transposition.
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Why Choose FRP Cable Trays for Your Infrastructure Needs?
It is crucial to select the appropriate materials for your projects in the ever-changing world of industrial and infrastructural uses. One such substance that has become increasingly popular is Fiber Reinforced Plastic (FRP). Engineers and project managers in particular are starting to use FRP cable trays. Leading FRP cable tray manufacturer Chemitech Group is aware of how crucial these trays are to maintaining the effectiveness and security of your infrastructure. For cable management, FRP cable trays are the best option. Here's why.
1. Superior Corrosion Resistance
FRP cable trays offer outstanding corrosion resistance, which is one of the strongest arguments in favor of using them. FRP trays, in contrast to conventional metal trays, are resistant to rust and corrosion from moisture, abrasive chemicals, and severe weather. For sectors where exposure to corrosive materials is frequent, like chemical processing, wastewater treatment, and maritime applications, this makes them perfect.
2. Lightweight and High Strength
Impressive strength-to-weight ratios are provided by FRP cable trays. They are easier to handle and install without sacrificing strength because they are substantially lighter than their metal equivalents. In addition to saving labor costs and installation time, this lessens the structural strain on structures and support systems. FRP cable trays are strong and dependable due to their ability to support heavy cables and equipment despite being lightweight.
3. Electrical and Thermal Insulation
Any infrastructure project must prioritize safety, and FRP cable trays perform exceptionally well in this area. Because they are non-conductive, they offer superior electrical insulation, reducing the risk of short circuits and accidental electrocution. Furthermore, FRP material does not retain heat due to its low thermal conductivity. This characteristic improves the overall safety of your installation by lowering the possibility of overheating and associated fire threats.
4. Durability and Longevity
FRP cable trays are made with durability in mind. Their exceptional resilience to impact, UV rays, and environmental stresses guarantee a prolonged service life, even under the most severe circumstances. This durability minimizes the need for frequent repairs or replacements, which results in cheaper maintenance costs and less downtime.
5. Customizable and Versatile
Chemitech Group provides a variety of FRP cable tray designs to satisfy various project specifications. Depending on your requirements, our FRP cable trays can be made to seem like ladders, channels, or perforations. Because of its adaptability, FRP may be easily modified and adjusted on-site to ensure a perfect fit for any purpose. Furthermore, the material has unparalleled design freedom because it can be molded into intricate forms and sizes.
6. Cost-Effective Solution
FRP cable trays may need a larger initial investment than traditional materials, but over time, the advantages greatly exceed the disadvantages. Throughout the product's lifetime, the ease of installation and the decreased need for maintenance, repairs, and replacements lead to significant cost savings. Additionally, the exceptional functionality and dependability of FRP cable trays guarantee continuous operations, enhancing the overall profitability and efficiency of the project.
7. Environmental Benefits
In today's infrastructure developments, sustainability is becoming a higher emphasis. Because FRP cable trays are composed of recyclable materials and have a smaller environmental impact than conventional metal trays, they are an environmentally responsible option. Their extended lifespan and low maintenance needs also help to save resources and cut down on waste, making them compliant with environmental laws and green construction principles.
1. Superior Corrosion Resistance
FRP cable trays offer outstanding corrosion resistance, which is one of the strongest arguments in favor of using them. FRP trays, in contrast to conventional metal trays, are resistant to rust and corrosion from moisture, abrasive chemicals, and severe weather. For sectors where exposure to corrosive materials is frequent, like chemical processing, wastewater treatment, and maritime applications, this makes them perfect.
8. Fire Retardant Properties
In high-risk workplaces, in particular, safety requirements frequently require the use of fire-resistant materials. Tough fire safety standards are met by FRP cable trays, which come with fire-retardant qualities. Your infrastructure will be safe and in compliance with industry standards thanks to this function, which offers an extra layer of security.
9. Ease of Installation and Maintenance
FRP cable trays have components that are simple to assemble and modify on-site, making installation simple. Because they are lightweight, less large installation crews and heavy lifting equipment are required, which further lowers labor expenses. Moreover, maintenance is simple and infrequent due to the long-lasting and non-corrosive qualities of FRP, which lowers operating expenses.
Conclusion
Selecting the appropriate cable management solution is essential for maintaining the longevity, effectiveness, and safety of your infrastructure. Fiber-reinforced plastic (FRP) cable trays are a great option for a variety of industrial applications since they have several advantages. Fiber Reinforced Polymer (FRP) cable trays offer a dependable and economical solution that fulfills the requirements of contemporary infrastructure projects. These features include outstanding corrosion resistance, high strength, electrical insulation, and environmental sustainability.
We at Chemitech Group are dedicated to providing the best FRP cable trays possible, adhering to the strictest industry guidelines. Our knowledge and commitment to innovation guarantee that you get the best goods and services for your requirements. Please get in touch with us right now to find out more about how our FRP cable trays can improve your infrastructure projects.
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