Chloe Zhang
Electrical wires are often covered in plastic due to plastic's flexibility, durability, and insulating properties. Plastic coverings cannot transfer power, but electrical power can pass through the human body. Therefore, the plastic covering insulates the metal wire core from the human body to protect us from harm. Flexible plastic conduit tubing is designed to accommodate tight bends and provide superior protection to wires and cables. Flexible conduit tubing is typically made from materials such as polyamide, PVC, and polypropylene, which are durable and pliable.
| Characteristics | Values |
|---|---|
| Material | Polyamide, PVC, Polypropylene, Polyethylene, Polyvinyl Chloride, Fluoroplastic, Natural Rubber, Styrene Butadiene Rubber, Ethylene Propylene Rubber, Mixed Silicone Rubber |
| Function | Insulation, Protection, Ease of Installation, Durability, Flexibility, Rust Resistance, EMI/RFI Shielding |
| Applications | Wiring in Demanding Environments, Automotive Wire Harnesses, Industrial Machinery, Low-Voltage Wires and Cables |
| Properties | Moisture-Resistant, Flame Retardant, Abrasion-Resistant, Heat-Resistant, Chemical-Resistant, Weather-Resistant |
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What You'll Learn
Plastic conduits last over 100 years
Flexible conduit, also known as flexible tubing or flexible conduit pipe, is a protective conduit used for routing and protecting electrical wires, cables, and other types of conductors. It is typically made of a durable and pliable material, such as plastic or metal, that allows it to bend and flex without breaking or damaging the wires inside.
Flexible conduit comes in two types: metal and non-metal. Electrical Nonmetallic Tubing (ENT) is the most commonly used plastic flexible conduit type. It is designed to be moisture-resistant and flame retardant. ENT plastic conduits have a lifespan of over 100 years.
While metal conduits typically have a longer lifespan, they are also more susceptible to rusting, which can shorten their lifespan. Flexible metal conduits (FMC) are made by coiling a ribbed strip of aluminum or steel into a hollow tube, providing the strength of a metal conduit with the flexibility of non-metal conduits. FMCs are also coated with rust prevention treatments, ensuring long-term use.
The durability of plastic conduits has been demonstrated in several studies. A Dutch scientific study officially confirmed in 2006 that the lifespan of PVC pipes, when installed correctly, exceeds 100 years. Another study in 2004 assessed the residual life expectancy of plastic water pipes to be at least 100 years. These studies provide confidence in the long-term performance and sustainability of plastic conduit systems.
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Plastic conduits are flexible and protective
Plastic conduits are flexible tubes used to route and protect electrical wires, cables, and other types of conductors. They are typically made of durable and pliable materials, such as polyamide, polypropylene, PVC, and other plastics, that allow them to bend and flex without breaking or damaging the wires inside. This flexibility is particularly useful when installing wires in tight spaces or where rigid non-flexible conduits are impractical to use.
Plastic conduits are designed to keep wires and cables safe, organised, and routed precisely where they are needed without entanglement. They are also moisture-resistant and flame retardant, providing superior protection against liquid, heat, and fire. In addition, plastic conduits can be slipped over wiring that is already attached, making them convenient for retrofitting jobs.
The flexibility of plastic conduits also facilitates tasks such as wire pulling during construction, reducing installation difficulties. Plastic conduits are lighter in weight compared to metal conduit materials, making them easier to work with. They also have excellent electrical insulation performance, preventing the transfer of electrical power and protecting against potential safety hazards.
Plastic conduits are widely used in various applications, from automotive wire harnesses to industrial machinery, due to their flexibility, durability, and protective capabilities. They come in different sizes and designs to suit specific needs, and their use is regulated by international standards to ensure safety and performance.
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Plastic is an electrical insulator
As an insulator, plastic is often used to cover electrical wires and cables, providing protection and support. This is known as a plastic conduit, and it is commonly made from flexible materials such as PVC, polyamide, or polypropylene. These conduits can be slipped over wiring to provide superior protection and organisation for wires and cables. They are designed to accommodate tight bends and can be used in various applications, including automotive wire harnesses and industrial machinery.
The flexibility of plastic conduits allows for convenient installation and the ability to route wires precisely where they are needed without entanglement. They also provide protection against liquid, abrasion, heat, fire, and chemicals, depending on the specific material and design. For example, PVC-coated steel flexible conduits offer additional rigidity and defence against crush damage or kinking.
The use of plastic as an electrical insulator is crucial for safety in appliances and electrical equipment. By coating these items in plastic, the risk of electrical shocks or burns is reduced. This property of plastic makes it ideal for electrical applications, ensuring the safe and efficient functioning of electrical devices.
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PVC is a widely used plastic
Polyvinyl Chloride, or PVC, is a widely used plastic. It is the world's third-most-widely produced synthetic polymer, with around 50 million tons manufactured annually. PVC is used in a diverse range of applications, from window frames to food packaging, car interiors, and medical products. It is also commonly used as the insulating sheath on electrical cables, where its properties as a good electrical insulator, ease of extrusion, and resistance to burning make it an ideal material.
PVC is a versatile thermoplastic polymer that can be made flexible or rigid by the addition of plasticizers. Flexible PVC is used in tubing for medical applications, such as blood collection and catheters, as well as conduit tubing for wires and cables. This type of conduit tubing is designed to accommodate tight bends and provides superior protection for wires, keeping them safe, organised, and precisely routed.
In the construction industry, PVC is used for vinyl siding, which is a popular low-maintenance material for window frames and sills. It comes in a range of colours and finishes, including a wood-effect finish, and can be used as a substitute for painted wood. PVC is also used in flooring, pipes, and even clothing due to its water-resistant qualities.
However, PVC has attracted criticism for its environmental and health impacts. A key ingredient in PVC is known to be carcinogenic, and some of its additives are endocrine disruptors. There are also concerns about the release of noxious compounds when PVC is burned. Despite these concerns, PVC remains a commonly used plastic due to its versatility, durability, and cost-effectiveness.
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Polypropylene flex split conduit is ideal for retrofitting
Polypropylene flex split conduit is a highly effective option for protecting pre-assembled cables. Its two-piece design allows it to be easily slipped over wiring, eliminating the need for unplugging. This reclosable design is what makes it ideal for retrofitting jobs.
Polypropylene flex split conduit is also equipped with FLEXAZip® technology, which includes a wire routing tool and an additional closure strip for sealing. This technology enables rapid and effortless cable placement, ensuring their protection.
Furthermore, polypropylene flex split conduit offers excellent resistance to abrasion, heat, fire, and aggressive chemicals. These properties make it a popular choice for industrial machinery, where it can protect wiring harnesses in engine bays that may be exposed to heat, sparks, and chemicals.
The versatility of polypropylene flex split conduit lies in its ability to accommodate wiring splits and forks. Its flexibility and durability make it suitable for a range of applications, from automotive wire harnesses to industrial environments. With its flame retardance, chemical resistance, and mechanical strength, polypropylene flexible conduit provides superior protection for cables and wiring.
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Frequently asked questions
The flexible plastic on wires is called a flexible electrical conduit. It is made of materials such as polyamide, PVC, polypropylene, and polyethylene.
The flexible plastic on wires serves as an insulator, preventing the transfer of electrical power. It protects people from potential harm by insulating the metal wire core from the human body.
Flexible plastic conduits provide protection, organisation, and precise routing of wires and cables. They are also moisture-resistant and flame retardant. Additionally, they offer ease of installation and flexibility in bending without damaging the wires inside.
Yes, flexible metal conduits (FMC) are an alternative. FMCs are made by coiling a ribbed strip of aluminium or steel into a hollow tube. They offer the strength of metal while still allowing for easy bending and flexing.
You can purchase flexible plastic conduits from suppliers such as AerosUSA and TANO CABLE. These companies offer a range of products that meet international regulatory standards and provide expert technical advice.
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