Why Standard H07-RNF Cable Should Not Be Used for Submersible Pumps
When it comes to choosing cables for submersible pumps, it is crucial to select the right type to ensure safety, reliability, and longevity. One common mistake is using a standard H07-RNF cable, which, despite its versatile applications, is not suitable for submersible pump installations. Here are the key reasons why:
1. Insufficient Water Resistance
The primary concern with using H07-RNF cables in submersible pump applications is their insufficient water resistance. H07-RNF cables are designed for general industrial and domestic use where the exposure to water is either non-existent or minimal. Submersible pumps, however, operate entirely underwater and require cables with specialized waterproofing and insulation properties to prevent water ingress, which can cause short circuits and cable degradation.
2. Inadequate Insulation Material
H07-RNF cables typically use rubber insulation, which is suitable for various environments but not for prolonged underwater exposure. Submersible pump cables, on the other hand, are specifically designed with materials like cross-linked polyethylene (XLPE) or polyvinyl chloride (PVC), which offer superior water resistance and mechanical strength, ensuring the cables can withstand the underwater environment without compromising their insulation properties. *With the exception of the AD8 Approved H07-RNF enhanced Rubber cables
3. Mechanical Durability
Submersible pump cables are subject to harsh underwater conditions, including pressure, movement, and potential contact with sharp objects or debris. H07-RNF cables are not built to endure such mechanical stresses. They lack the necessary robustness and flexibility required for submersible applications. Submersible cables are reinforced to handle these conditions, ensuring long-term performance and safety.
4. Chemical Resistance
Water in wells, boreholes, or other submersible environments can contain various chemicals, salts, and minerals that can be corrosive over time. H07-RNF cables are not designed to resist these chemical exposures, which can lead to cable deterioration and failure. Submersible pump cables are manufactured with materials that provide excellent chemical resistance, ensuring they remain intact and functional even in chemically aggressive environments.
5. Temperature Resistance
Submersible pumps often operate in environments where temperature fluctuations are common. H07-RNF cables have a limited temperature range, which might not be suitable for the varying temperatures encountered underwater. Submersible pump cables are designed to withstand a broader temperature range, ensuring consistent performance regardless of the thermal conditions.
6. Regulatory and Safety Standards
Using the correct type of cable is not just about performance; it’s also about compliance with safety regulations. Submersible pump cables adhere to stringent international standards and certifications that ensure their safety and reliability in underwater applications. H07-RNF cables do not meet these specific standards, and using them can result in non-compliance with safety regulations, leading to potential legal and insurance issues.
Conclusion
While H07-RNF cables are versatile and suitable for a wide range of industrial and domestic applications, they fall short in meeting the demanding requirements of submersible pump operations. For the safety, efficiency, and longevity of submersible pumps, it is essential to use specially designed submersible pump cables. These cables offer the necessary water resistance, mechanical durability, chemical resistance, and temperature tolerance required to ensure reliable and safe operation in underwater environments.
Selecting the right cable might seem like a minor detail, but it is a critical factor that can significantly impact the performance and safety of your submersible pump system. Always consult with a professional and opt for cables specifically designed for submersible applications to avoid the pitfalls of using an inappropriate cable type like the H07-RNF.
To overcome all of these issues we suggest you use the Enhanced H07-RNF cable with AD8 Approved which is available from Contact Cables by following this LINK
