RCBOs: Advanced Circuit Protection

RCBOs (Residual Current Circuit Breaker with Overload Protection) incorporate the latest features in safety and comply with the most up-to-date wiring policies and regulations. They operate on earth fault and current overload situations, which means they function like a combined MCB and RCD at the same time in one single pole device. On top of all that, the device will work perfectly while tripping safely in a real situation or while testing, even if locked in an on or off state.

RCBO Features and Specifications

Compact Design and Easy Installation

RCBOs can slot into the existing space of an MCB in your consumer unit as they are only one modular width at 18mm wide. They come with ample cabling that is also colour-coded for easy installation. They are available in an assortment of tripping varieties that include B or C type, both with a tripping sensitivity of 30mA. The breaking capacity is usually 10kA as standard but some brands have the more cost effective 6kA versions available.

Double Pole RCBO for Non-Consumer Unit Applications

Alternatively, for non-consumer unit applications, you could opt for a double pole RCBO that has a single pole and neutral in two modular spacings, making it 36mm wide. This option is ideal for applications where dual protection is required, and it allows for safe and efficient operation in various electrical setups.

Choosing the Right RCBO for Your Circuit

Ensuring Proper Current Rating

When choosing the right RCBO for your circuit, you should always make sure that the current rating of the device is lower than that of the cable used. This ensures faster tripping in case the cable starts overheating, maintaining the cable’s integrity. However, it’s also advisable to consider increasing overload protection by installing an additional monitoring relay separately, just to be on the safe side. This provides an extra layer of protection for your system and enhances overall safety.

The 18th Edition Wiring Regulations and RCBO Compliance

New Standards for Electrical Installations

The 18th Edition of the Wiring Regulations (BS 7671), introduced in January 2019, brought significant changes to electrical safety standards. The regulations place a greater emphasis on safety and provide updated guidelines for the design, installation, and maintenance of electrical systems. The inclusion of Residual Current Circuit Breakers with Overload Protection (RCBOs) is highly recommended under these regulations. RCBOs offer a dual level of protection against both earth faults and overloads, ensuring compliance with modern safety standards. This is particularly important in both domestic and commercial installations where electrical hazards can pose serious risks to human life and property.

Impact of the 18th Edition on Circuit Protection

Under the 18th Edition Wiring Regulations, RCBOs are increasingly favored for new electrical installations because they offer a more robust solution for circuit protection compared to traditional RCDs and MCBs. The new regulations require that each circuit be individually protected, and RCBOs are well-suited for this purpose as they combine the functionality of both an RCD and an MCB in one device. This not only improves the safety of electrical systems but also simplifies the installation process by reducing the number of devices needed. By adhering to these updated guidelines, electrical installations can meet the highest safety standards, reducing the risk of electrical faults and improving overall reliability.

Expert Assistance for Circuit Protection Solutions

Expert Electrical can assist you in your quest to find the most suitable circuit protection equipment for your next electrical project. Our expert team is here to provide guidance and ensure you select the right products for your needs.