Tough Rubber Sheathed Flexible Cords are durable electrical cables designed for applications requiring flexibility and resistance to environmental factors. These cables feature flexible stranded copper conductors with ethylene propylene rubber insulation and a tough rubber outer sheath, making them suitable for demanding environments where standard cables might fail.
Applications
These versatile cables are ideal for:
- Damp environments with minimal risk of mechanical damage
- Kitchen appliances such as washing machines, ovens, dishwashers
- Household equipment including vacuum cleaners, irons, and portable tools
- Light industrial machinery and agricultural equipment
- Workshops and commercial premises
- Applications requiring resistance to oils and greases
Note: Not suitable for permanent outdoor installation or situations with high mechanical stress exposure.
Technical Standards
- Harmonized Code: H05RR-F
- Manufactured to: BS EN 50525-2-21 (formerly BS7919)
- Conductor: Class 5 flexible stranded copper conductor to BS EN 60228
- Insulation: Cross-Linked Elastomeric Type EI4 to BS EN 50363-1 (Ethylene Propylene Rubber)
- Sheath: Cross-Linked Elastomeric Type EM2 to BS EN 50363-2-1 (Tough Rubber CPE Mixture)
- Flame Retardant: Compliant with IEC 60332
Construction
- Conductor: Flexible stranded copper or tinned annealed copper
- Insulation: Ethylene Propylene Rubber (EPR)
- Sheath: Tough Rubber (CPE Mixture)
- Core Identification Colors:
- 2 Core: Brown, Blue
- 3 Core: Brown, Blue, Green/Yellow
- 4 Core: Brown, Black, Grey, Green/Yellow
- 5 Core: Brown, Black, Grey, White, Green/Yellow (varies by manufacturer)
Technical Characteristics
- Voltage Rating: 300/500 Volts
- Temperature Range:
- Fixed Installation: -25°C to +60°C
- Minimum Bending Radius: 6 × overall cable diameter
- Test Voltage: 2000V
- Ozone Resistant: Yes
- Oil and Grease Resistant: Yes
Dimensions and Specifications
| CCC Code | Conductor Size (mm²) | Stranding (mm) | No. of Cores | Weight (kg/km) | Overall Diameter (mm) | Gland Size (mm) |
|---|---|---|---|---|---|---|
| 3182/75 | 0.75 | 24/0.20 | 2 | 63 | 6.6 | 20/16 |
| 3183/75 | 0.75 | 24/0.20 | 3 | 78 | 7.2 | 20/16 |
| 3184/75 | 0.75 | 24/0.20 | 4 | 94 | 7.8 | 20/16 |
| 31821 | 1.0 | 30/0.20 | 2 | 77 | 7.1 | 20/16 |
| 31831 | 1.0 | 30/0.20 | 3 | 90 | 7.5 | 20/16 |
| 31841 | 1.0 | 30/0.20 | 4 | 110 | 8.2 | 20/16 |
| 31821/5 | 1.5 | 30/0.25 | 2 | 115 | 8.7 | 20S |
| 31831/5 | 1.5 | 30/0.25 | 3 | 135 | 9.2 | 20S |
| 31841/5 | 1.5 | 30/0.25 | 4 | 170 | 9.8 | 20S |
| 31851/5 | 1.5 | 30/0.25 | 5 | 195 | 10.3 | 20S |
| 31822/5 | 2.5 | 50/0.25 | 2 | 165 | 10.3 | 20S |
| 31832/5 | 2.5 | 50/0.25 | 3 | 195 | 11.0 | 20S |
| 31842/5 | 2.5 | 50/0.25 | 4 | 245 | 11.9 | 20 |
| 31852/5 | 2.5 | 50/0.25 | 5 | 290 | 12.3 | 20 |
Electrical Characteristics
| Nominal Cross Sectional Area (mm²) | Reference Method A (In conduit in wall) | Reference Method C (Clipped direct) | Voltage Drop (mV/A/m) |
|---|---|---|---|
| 1.0 | 11 | 20 | 44 |
| 1.5 | 14.5 | 27 | 29 |
| 2.5 | 20 | 31 | 18 |
| 4.0 | 26 | 42 | 12 |
| 6.0 | 34 | 53 | 7.9 |
Installation Guidelines
- Should not be installed at temperatures below 0°C
- Maintain minimum bending radius during installation and use
- Not suitable for permanent outdoor applications
- Ensure proper securing to prevent mechanical damage
- Follow local electrical codes and IET Wiring Regulations for installation
Available Configurations
In addition to standard configurations, these cables are available in various configurations including:
- Single core versions (1.5mm² to 500mm²)
- Multi-core versions (2-core to 36-core)
- Special configurations for specific industrial applications
- Custom color options for core identification
