When it comes to electrical wiring, safety and protection are paramount. One essential component that often gets overlooked is the flexible conduit. But what exactly is it, and how do you choose the right type for your installation? Whether you're a trade professional, novice or a DIY enthusiast, this guide will help you understand flexible conduit and its various types, making your decision-making process smoother.
What is Flexible Conduit?
Flexible conduit is a protective tubing that shields electrical wires, allowing for safe and efficient installation. Unlike rigid conduits, flexible conduits can bend and twist, making them ideal for installations where space is tight or where movement might be necessary. Whether you're dealing with TV cables, household wiring, or industrial settings, flexible conduit provides a versatile and safe solution.
Think of it as the armor for your wiring, protecting it from:
Physical damage
Moisture
Corrosion
Chemical exposure
UV radiation
Vermin resistant
Fire protection
Flexible conduits come in various sizes, including all these popular conduit sizes: 10mm white flexible conduit, 16mm flexible conduit, 20mm flexible conduit, 30mm flexible conduit, and 50mm flexible conduit, basically everything from 5mm all the way up to 200mm, making them adaptable to different wiring needs.
Why Use Flexible Conduit for Electrical Installations?
Whether you’re installing wiring in your home or a commercial building, flexible conduit offers several advantages:
1. Versatility
Its ability to bend means it can navigate around corners and through awkward spaces. From flexible conduit 10mm to 30mm flexible conduit, there’s a conduit size for every project.
2. Protection
Provides insulation and protects wires from environmental damage, especially in challenging spaces from behind TV cables to commercial and industrial settings.
3. Ease of Installation
Flexible conduit can be easily cut to size, and it’s easier to work with in confined spaces compared to rigid conduits.
4. Durability
Many types are designed to resist corrosion, moisture, and temperature changes, making them ideal for a variety of environments.
For example, flexible conduit fittings and clips can help securely fasten the conduit in place, ensuring that your installation is tidy and safe.
Types of Flexible Conduit
Not all flexible conduits are created equal! Different materials and designs cater to different environments and requirements. Here are the most common types of flexible conduits you’re likely to encounter:
Polypropylene Flexible Conduit
Best For: Polypropylene flexible conduit is ideal for indoor use in dry environments where flexibility and corrosion resistance are important, but it can also be used outdoors in dry conditions, especially where corrosion is a concern. It’s commonly used for light-duty applications in residential settings, such as protecting wiring for appliances and low-voltage systems.
Key Features
Lightweight
Corrosion-resistant
UV resistant
Typically used for low-stress environments
Common Uses
Residential installations, appliances, and light duty commercial and industrial work.
Pros
Inexpensive and easy to install. It’s also available in various sizes like 10mm white flexible conduit or 50mm flexible conduit, ensuring you have the right fit for your project.
Galvanised Steel Flexible Conduit
Best For: Ideal for environments requiring robust protection against physical damage and corrosion, especially where mechanical strength is needed. Its galvanised coating ensures durability in harsh conditions, making it suitable for applications demanding toughness and resistance to the elements.
Key Features
Heavy duty protection
Corrosion-resistant due to the galvanised steel coating
Ideal for high-stress environments
Common Uses
Factories, heavy duty installations, and areas with high mechanical wear.
Pros
Durable and great for industrial use. 25mm steel flexible conduit is a popular choice for industrial and commercial setups where durability is key.
PVC Coated Galvanised Steel Conduit
Best For: PVC coated galvanised steel conduit is ideal for outdoor, commercial and industrial environments where both mechanical protection and moisture resistance are needed. Its durable coating shields against corrosion and physical damage, making it suitable for applications like exterior wiring and installations exposed to harsh weather conditions.
Key Features
Steel core with an added layer of PVC
Extra insulation and protection against moisture
Common Uses
Outdoor areas exposed to rain, moisture-prone areas like basements or bathrooms.
Pros
Combines the strength of steel with the moisture-resistance of PVC, making it versatile for different environments.
304 Stainless Steel Flexible Conduit
Best For: 304 stainless steel flexible conduit is ideal for harsh environments where high corrosion, chemical resistance, and temperature protection are required. Use it in industries such as marine, chemical, or pharmaceutical, where durability and protection from extreme conditions are essential.
Key Features
High resistance to corrosion and chemicals
Ideal for environments with exposure to saltwater, harsh chemicals, or extreme weather conditions
Common Uses
Chemical plants, marine environments, and areas exposed to harsh chemicals.
Pros
Flexible steel conduit is ideal for protecting wiring in areas that require flexibility and extreme durability.
PVC Spiral Reinforced Flexible Conduit
Best For: PVC spiral reinforced flexible conduit is ideal for applications requiring flexibility and durability, especially where continuous movement or vibration occurs. It's also excellent for use as an underground burial conduit, providing strength and protection against soil and moisture. Use it in industrial machinery, robotics, HVAC systems, and underground installations.
Key Features
Reinforced with a spiral for added strength and flexibility
Lightweight and resistant to chemicals and corrosion
Smooth Inner bore, easy cable installation
Perfect as an underground flexible conduit
Excellent for applications requiring movement
Common Uses
Industrial machinery, robotics, HVAC systems, and environments with frequent movement or vibration.
Pros
The spiral design enhances flexibility and durability, ideal for dynamic environments. It’s available in various flexible conduit sizes, including corrugated flexible conduit for enhanced protection.
How to Choose the Right Flexible Conduit for Your Needs
When choosing the right type of flexible conduit, consider the following factors:
Environment:
Indoor vs. Outdoor
For outdoor use, look for conduits that are water resistant or liquid tight, like PVC covered or some corrugated flexible conduit.
Moisture
White flexible conduit is a good choice for visible indoor installations, while PVC conduits offer better protection against water.
Exposure to Chemicals: Stainless steel or PVC reinforced conduits are the best choices for environments with chemical exposure.
Type of Wiring
High-voltage vs. low-voltage wiring may require different levels of insulation and protection. Flexible conduit junction boxes can help organise and secure your wiring within the conduit system.
Durability Requirements
For heavy-duty environments where physical damage is a concern, opt for 25mm steel flexible conduit or 50mm PVC flexible conduit.
For dynamic environments where movement is frequent, PVC spiral reinforced flexible conduits are ideal.
Installation Tips for Flexible Conduit
Cutting the Conduit
Use a hacksaw or conduit cutter to ensure clean edges.
Fitting the Wires
Ensure your wires have enough room for ventilation; it is suggested to allow an additional 40% space within the conduit.
Sealing the conduit
Use proper flexible conduit fittings, clips, and connectors to seal and secure the conduit, preventing moisture or dust from entering.
Final Thoughts: Choosing the Right Flexible Conduit
Selecting the right flexible conduit for your electrical installation can make a huge difference in the longevity and safety of your wiring. Start by evaluating your environment, the level of protection needed, and your installation’s flexibility requirements.
Not sure which conduit is right for you? Feel free to reach out to an expert or check out our comprehensive product range for more information on the best fit for your project. Safe, reliable electrical installations start with the right protection!
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By making informed choices and selecting the right type of flexible conduit, you’ll ensure your electrical wiring is safe, durable, and up to code. Happy installing!
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