Each of the two devices with yellow test buttons are marked '63A'. My assumptions:
- The set of devices to the left of each of these are connected to them
- The markings on each device in the form BNN denote rated current, e.g. B6 is 6 Amps.
The right-hand bank of devices goes 6 + 32 + 40 = 78A, which is clearly greater than 63A.
Furthermore, the sum of all the rated currents is 132A, which is clearly greater than the rated current on the main switch of 100A
1) Is this how the markings and the layout of this consumer unit are meant to be interpreted?
2) Is this a problem?