Plug in solar

[ebee]

OK John, I will stand corrected, an unfused spur from a ring or radial is part of that ring circuit or radial circuit.
If it contains a fuse (such as an FCU or a SFCU then it becomes a circuit in its own right - that what I meant but you spotted my non-deliberate mistake.

 

[denso13]

We haven't seen approved installation instruction yet, but it seems they are defining a circuit as everything connected to a single breaker in a consumer unit, i.e., everything that a breaker turns off is one circuit.