We have a small outbuilding which has a 6A MCB (B6) protecting the lighting circuit. This consisted internally of 8 x 50W halogen downlighters each with its own transformer and 2 x 100W external lights switched through a PIR.
For security reasons I have replaced the 2 x 100W external lights with 2 x 500W floodlights. The MCB now has a tendency to trip. I realise that a 6A rated MCB is right on the limit for the new load. 1mm cable has been used throughout the installation.
Am I in order to upgrade the MCB to 10A to prevent the tripping on this basis?
For security reasons I have replaced the 2 x 100W external lights with 2 x 500W floodlights. The MCB now has a tendency to trip. I realise that a 6A rated MCB is right on the limit for the new load. 1mm cable has been used throughout the installation.
Am I in order to upgrade the MCB to 10A to prevent the tripping on this basis?