Double Ring Diagram. 2 or more circuits. A split load cu.
I am replacing one of the lighting switches in my house and the new switch is marked up differently to the old one. The first image shows a simple ring main to and from the consumer unit. Download scientific diagram double ring resonator system coupled to a waveguide.
The image in the ring is that of a quasar radio lobe discovered in 1989 by glangston et al.
When this takes place the functioning ring automatically wraps around the disabled ring to ensure data flow. If the circuit was originally a ring main but this has become broken and is now a spur or radial main then it could be fed with 25mm and 32 amp fuse. 2 or more circuits. The first image shows a simple ring main to and from the consumer unit.