I have supply in the garage with its own small consumer unit with a 63a breaker and 1 B6 and 1 B16 breakers. The garage has a ring of sockets coming from the B16 breaker. An electrician has added a wire into the 16amp breaker to a second shed. So that is 2 rings from one B16 breaker. I now have a third shed. Can I put a third wire into the 16amp breaker or do I need to get a whole new consumer unit with 3, 16amp breakers, one for each shed? Thanks