Fusebox RCBO - Mini Compact Type A - 6A B Curve
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Product Information
Full details
This Fusebox RCBO is designed for electricians and homeowners seeking a reliable and compliant circuit protection device. Its key benefit is combining Residual Current Device (RCD) and Miniature Circuit Breaker (MCB) functions in a compact 2-pole unit, offering enhanced safety and space-saving. A potential consideration is its specific Type A RCD and B curve characteristics, which should align with the circuit's protection needs.
All features
| Series | Mini Compact Type A |
|---|---|
| Model Part Number | RTAMB06 |
| Brand | CP (Electric) |
Extended Product Information
FAQs
What is the difference between Type A and Type B RCDs?
Type A RCDs provide protection against sinusoidal AC currents and pulsating DC currents. Type B RCDs offer the widest range of protection, including sinusoidal AC, pulsating DC, and smooth DC fault currents. The 'B curve' refers to the tripping characteristic of the MCB part, indicating it's designed for circuits with higher inrush currents.
Can I use this RCBO for domestic lighting circuits?
Yes, a 6A B curve RCBO can be used for lighting circuits, particularly if they include electronic dimmers or other components that might cause a slight inrush. However, ensure the RCD type (Type A) is suitable for the specific equipment used.
What does '18th Edition Compliant' mean?
'18th Edition Compliant' means the product meets the requirements of the 18th Edition of the IET Wiring Regulations (BS 7671), which are the current standards for electrical installations in the UK.
What is the breaking capacity of this RCBO?
This RCBO has a breaking capacity of 6 kA, which is the maximum fault current it can safely interrupt.
How often should I test the RCD function?
It is recommended to test the RCD function monthly using the test button. Regular testing ensures the device is ready to operate in the event of an earth fault.
What is the terminal capacity for wiring?
The terminal capacity for wiring is 16mm².
Is this RCBO suitable for outdoor use?
No, this RCBO has an IP20 rating, which means it is protected against solid objects larger than 12.5mm but is not protected against water. It should only be installed in a suitable enclosure indoors.
Troubleshooting
RCBO trips immediately upon reset
This usually indicates a persistent fault on the circuit. Disconnect all loads from the circuit and attempt to reset the RCBO. If it holds, reconnect loads one by one to identify the faulty appliance or wiring. If it still trips with no load connected, there may be a wiring fault or an internal issue with the RCBO.
RCD test button does not trip the RCBO
Ensure the RCBO is correctly connected and energized. If the test button fails to trip the device, it may be faulty and require replacement. Do not use the circuit until the RCBO is confirmed to be functioning correctly.
Device feels warm to the touch during normal operation
A slight warmth might be normal under load, but excessive heat indicates a potential problem. Check that connections are tight (2.5Nm) and that the cable size is appropriate for the terminal capacity (16mm²). Overloading the circuit or a loose connection can cause overheating.
Pros and Cons
Pros
- Combines MCB and RCD functions for enhanced safety and simplified installation.
- Compact design saves space within fuseboxes.
- Type A RCD offers protection against a wider range of fault currents than Type AC.
- B curve is suitable for equipment with higher starting currents.
- Meets current electrical safety standards (18th Edition).
Cons
- Requires careful consideration of the RCD type (Type A) and tripping curve (B) to match specific installation requirements.
- IP20 rating means it is not suitable for environments exposed to moisture or dust.
- 2-pole design may not be suitable for all earthing systems (e.g., TN-S requires 4-pole for RCD protection).
Setup, Compatibility & Care
Setup: This RCBO is designed to be installed within a compatible consumer unit. Ensure the power to the circuit is completely isolated before attempting any installation. Connect the live supply cable to the line terminal and the outgoing live conductor to the load terminal. The neutral conductor should be connected to the neutral bar and not directly to the RCBO. Ensure all connections are tightened to the specified 2.5Nm torque using a calibrated torque screwdriver.
Compatibility: This unit is designed for 230V 50/60Hz systems. It is compatible with standard UK consumer units and fuseboxes that accommodate 2-pole devices. The B curve is suitable for circuits with higher inrush currents, but verify this is appropriate for your specific application. The terminal capacity is 16mm², so ensure your wiring falls within this range.
Care: This is a static electrical component and requires minimal physical care. Ensure the consumer unit remains clean and free from dust and moisture. Periodically, test the RCD function using the built-in test button to ensure it is operating correctly. Refer to the manufacturer's guidelines for specific testing intervals.