Aug. 12, 2024
Flexible Conduit
Flexible conduit has been widely used for many years and remains a popular choice for applications that require movement or adaptability. Made from various materials such as plastic, rubber, and metal, flexible conduit is suitable for both indoor and outdoor use.
This type of conduit typically consists of heavy-duty galvanized steel or plastic tubing with threaded connections, making it ideal for outdoor applications where it provides protection for electrical cables, panels, and other equipment from potential damage.
In the construction industry, flexible conduit is frequently used to route electrical wiring through tight spaces or around corners—areas where traditional wiring methods would be challenging or impractical. In this article, we’ll explore the different materials used in flexible conduit and their respective applications.
Plastic Flexible Conduit
Plastic flexible conduit is commonly made from thermoplastic materials like PVC (polyvinyl chloride) and PE (polyethylene). It's the most widely used type of flexible conduit and comes in various colors to suit different applications.
Conduit systems are essential for enclosing wires to reduce the risk of electrical hazards such as electrocution. Plastic conduits, in particular, are often encased in a waterproof covering that protects cables from water damage.
Specifications of Plastic Flexible Conduit:
- Material: Polypropylene
- Impact Resistance: Light (1 Joule at 5°C)
- Coil Length: 10 Meters
- Thickness: 20mm to 25mm
- Temperature Range: -5°C to 90°C
- Protection Rating: IP44-IP46
Advantages of Plastic Flexible Conduit:
- Lightweight and easy to install
- Can be easily bent to navigate around obstacles
- Suitable for use in environments exposed to high traffic or harsh weather conditions
Disadvantages of Plastic Flexible Conduit:
- Not as durable as metal flexible conduit
- May not be suitable for use in areas with high traffic or exposure to harsh weather conditions.
Metal Flexible Conduit
Metal flexible conduit is constructed from galvanized steel tubing with a protective zinc coating, making it more durable than plastic flexible conduit. It is designed to withstand harsh weather conditions and is less prone to corrosion over time. However, metal flexible conduit is heavier and can be more challenging to install compared to its plastic counterpart.
Available Sizes: 12mm, 16mm, 20mm, 25mm, 32mm, 40mm, 50mm
Specifications of Metal Flexible Conduit:
- Length: 10m – 50m
- Thickness: 16mm – 50mm
- Protection Rating: IP54
- Temperature Range: -20°C to +80°C
Applications:
Metal flexible conduit is ideal for systems requiring high durability and protection, such as:
- Electrical power systems
- Communication cables
- Motor leads
- Listed assemblies
- Wire fixtures
- Manufactured wiring systems
Advantages of Metal Flexible Conduit:
- Superior durability, able to withstand harsh weather conditions
- Less prone to corrosion over time
- Suitable for a wide range of applications, including electrical power and communication systems
Disadvantages of Metal Flexible Conduit:
- Heavier than plastic flexible conduit
- More challenging to install due to its weight and rigidity
Choosing Between Metal and Plastic Flexible Conduits
When deciding between metal and plastic flexible conduits, each material has its own advantages and disadvantages. The best choice for your application depends on your specific requirements.
If you need a lightweight conduit that's easy to install and suitable for moderate weather conditions, plastic flexible conduit is a solid option. However, if your application demands a more robust solution that can endure harsher weather, metal flexible conduit is the preferable choice.
Key factors to consider when selecting a flexible conduit include:
- The conduit’s weight
- Ease of installation
- Durability
- The temperature range the conduit can withstand
In some cases, a combination of both plastic and metal flexible conduits may be the best approach. For example, plastic conduits can be used in areas less exposed to the elements, while metal conduits can be employed in environments where greater protection is needed.
Conclusion
Flexible conduit is a protective tubing made from either plastic or metal, designed to safeguard electrical wiring and keep it organized. Its ability to bend and twist around tight corners makes it a versatile solution for various applications.
Plastic flexible conduits are generally made from polyvinyl chloride (PVC), while metal flexible conduits are typically constructed from galvanized steel. Both types come in a range of diameters and lengths to suit different needs and applications.
