In industrial and construction environments, heat resistance is not optional-it is critical to safety, performance, and cable lifespan. HO7RN-F is widely recognized as a robust rubber flexible cable, but is it truly heat resistant? This article provides a standards-based, technical analysis of HO7RN-F's heat resistance, compares it with other common heat-resistant cables, and explains why choosing a certified, experienced manufacturer makes all the difference.
What Is HO7RN-F Cable?
HO7RN-F is a harmonized heavy-duty rubber flexible cable defined under IEC 60245 and EN 50525-2-21, designed for applications requiring high mechanical strength and environmental resistance.
Breakdown of the HO7RN-F designation:
- H – Harmonized cable (HAR system)
- 07 – Rated voltage 450/750 V
- R – Rubber insulation
- N – Chloroprene rubber (neoprene) or equivalent synthetic rubber sheath
- F – Flexible, fine-stranded copper conductor (Class 5)
Structural Features:
- Annealed copper flexible conductor
- EPR rubber insulation
- Heavy-duty chloroprene rubber outer sheath
- Resistant to oil, abrasion, moisture, ozone, and mechanical stress
What Is a "Heat Resistant Cable"?
Heat Resistant vs. High-Temperature Cable
A heat resistant cable is designed to operate safely at elevated temperatures continuously without degradation of insulation or sheath, as defined by international standards. This is different from "high-temperature cables" (such as silicone cables), which operate at extreme temperatures but may lack mechanical robustness.
International Standard Criteria:
According to IEC 60245 and VDE 0282:
- Continuous operating temperature
- Thermal aging resistance
- Short-circuit temperature tolerance
- Insulation and sheath integrity after heat exposure
Heat Resistance Performance of HO7RN-F
Rated Operating Temperature
- Fixed installation: up to +90°C
- Flexible/movable applications: up to +60°C
- Minimum operating temperature: down to -25°C (flexing) / -40°C (fixed)
These values are fully compliant with IEC 60245-4 requirements.
Short-Term Thermal Resistance
- Short-circuit conductor temperature: up to +250°C
- Excellent thermal shock and thermal cycling performance
- Stable insulation resistance after thermal aging tests
Role of Rubber Materials
The EPR insulation and chloroprene rubber sheath provide:
- Superior thermal stability compared to PVC
- Reduced risk of cracking under heat stress
- Long service life in high-load environments
HO7RN-F is a heat resistant cable, suitable for medium-to-high temperature industrial applications, though it is not classified as an ultra-high-temperature cable.
Comparison with Other Common Heat Resistant Cables
| Cable Type | Continuous Temp Rating | Mechanical Strength | Flexibility | Typical Applications |
|---|---|---|---|---|
| HO7RN-F | +60°C (flexing) / +90°C (fixed) | Very High | Excellent | Industrial machinery, construction sites |
| H05RR-F | +60°C | Medium | Good | Light-duty appliances |
| Silicone Rubber Cable | +180°C to +200°C | Low | Excellent | Furnaces, ovens, high-temp zones |
| PVC Power Cable | +70°C | Low | Moderate | Indoor fixed wiring |
Positioning:
HO7RN-F offers the best balance between heat resistance, durability, and flexibility for demanding industrial environments.
Heat Resistance Performance in Typical Applications
Industrial Machinery
- Maintains insulation integrity under continuous load heat
- Resistant to oil and vibration-induced thermal stress
Construction Sites
- Performs reliably under sun exposure and heavy current loads
- Withstands temporary high surface temperatures
Outdoor & Harsh Environments
- Stable performance under combined heat, moisture, UV, and mechanical stress
- Suitable for mobile power supply and temporary installations
Why Choose a Professional HO7RN-F Cable Supplier?
Choosing the right supplier is as critical as selecting the right cable.
Our Advantages
✅ 30 years of manufacturing experience
✅ Full range of international certifications (HAR, VDE, IEC, EN compliant)
✅ Stable raw material sourcing and mature manufacturing processes
✅ Strict quality inspection at every production stage
✅ Multi-specification stock available, ensuring fast delivery
✅ Support for both small and large-scale projects
✅ Batch production, rapid shipment, and technical consultation
✅ Professional pre-sales and after-sales support teams
Value We Deliver with HO7RN-F:
- Improved operational safety
- Reduced downtime and maintenance costs
- Long-term reliability under thermal stress
- Faster procurement and project execution
Contact Us
Dongguan Greater Wire & Cable Co., Ltd.
📞 Tel / WhatsApp / WeChat:
+86 135 1078 4550
+86 136 6257 9592
📧 Email:
manager01@greaterwire.com
Our experts are ready to help you select the right HO7RN-F solution for your application.