Why does the Demand Switch only go to 16 amp, shouldn it be 30 or 32 amp?
We do not recommend the use of ring final circuits (which are the 30/32 amp ones) as they can produce elevated magnetic fields. SAGE recommended that they are not used any more and should be changed to one or two 16A radial circuits – their reasons can be found in the SAGE Appendices and in the Powerwatch article: House Wiring for Low EMFs that can be downloaded from Powerwatch by subscribers. The easiest way is to split the ring at about its mid-position and then feed the two halves as two 16A radial circuits. This will require another MCB in the consumer box, but you will need extra ways to accommodate the Demand Switch(es) so that should not be a problem.
