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Your Position: Home - Wires, Cables & Cable Assemblies - Where not to use the non-metallic flexible conduit?

Where not to use the non-metallic flexible conduit?

Author: Evelyn

Mar. 27, 2024

Where Non-Metallic Flexible Conduits Should Not Be Used

Non-metallic flexible conduits are widely utilized in various industries due to their flexibility, easy installation, and durability. However, there are several scenarios where their use is not recommended. Understanding these limitations is crucial for ensuring the safety and efficiency of your electrical systems. Below, we will discuss situations where non-metallic flexible conduits are not suitable, helping you make informed choices for your projects.

Unsuitable for Outdoor Applications

Non-metallic flexible conduits should be avoided in outdoor environments where they are exposed to harsh weather conditions and direct sunlight. Prolonged exposure to UV rays can deteriorate the conduit material, causing it to become brittle, crack, or fail over time. Furthermore, these conduits do not offer the same level of resistance to moisture and corrosion as metallic options, making them unsuitable for outdoor use where they may encounter water, chemicals, or other environmental hazards.

Not Recommended in High Temperature Areas

Non-metallic conduits have specific temperature ratings that limit their use in high-heat environments. Excessive heat can lead to the melting or warping of the conduit material, which could also release harmful fumes, creating potential safety risks. Always check the manufacturer’s temperature specifications before installing non-metallic conduits, and consider switching to metallic conduits if high temperatures are a concern in your application.

Inappropriate for Hazardous Locations

In areas where there is a risk of fire due to flammable gases, vapors, or dust, non-metallic flexible conduits should not be used. Such locations require conduits with certifications for explosion-proof or intrinsically safe installations to prevent the spread of flames and protect against electrical hazards. Using non-metallic conduits in these high-risk environments could compromise safety and violate regulations, so it’s vital to select the right conduit for hazardous settings.

Risky in Areas Prone to Physical Damage

Non-metallic flexible conduits are more prone to physical damage when compared to their metallic counterparts. In high-traffic areas or locations where they may be subjected to impact or crushing forces, non-metallic conduits can suffer from punctures, tears, or deformation. These damages may compromise the integrity of the conduit and expose the electrical wiring inside. For locations at higher risk of physical damage, it is advisable to use metallic conduits or reinforce the non-metallic ones with protective coverings or conduit guards.

Not Suitable for Underground Installations

Non-metallic flexible conduits are not ideal for underground use due to their vulnerability to moisture, soil contaminants, and mechanical stress. Underground conditions can quickly deteriorate non-metallic conduits, leading to water infiltration, corrosion, or even the collapse of the conduit. To avoid these problems, it is better to opt for metallic conduits or those specifically designed for underground environments, offering superior protection against moisture, chemicals, and soil conditions.

Conclusion

While non-metallic flexible conduits offer several advantages in terms of cost, flexibility, and ease of installation, they have limitations that restrict their usage in certain environments. Avoid using these conduits in outdoor settings, high-temperature areas, hazardous locations, areas at risk of physical damage, and underground installations. By choosing the right conduit type for each application, you ensure the safety, reliability, and compliance of your electrical system. If you need assistance selecting the appropriate conduit, feel free to contact us for professional advice and support.

For more information on Aluminum Flexible Metal Conduit, Flexible Conduit, or non-metallic fittings manufacturers, feel free to contact us.

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