sub-DB reading higher than feeder DB

The absolute classic I found was an installation where the peak and off peak meter tails had been commoned in a Henly block to supply a single set of tail which fed another Henly block where they were split again to supply their respective consumer units. The electric Aga was running up a huge bill as it was never charging on the “off peak” tariff as it charged after each use. A bit of rewiring dramatically reduced the bill.

It is quite amazing what  installation designs some people come up with, there’s a job I have not got around to going and looking at yet, an electrician doing other work was asked to check out a garage and garden office installation because of RCD tripping issues in the garage, but he said he can’t sort it out because he “cannot find out where they are supplied from”, I guessing it’s from the meter via the main switch and consumer unit, but there’s quite possibly a surprise in store.

The absolute classic I found was an installation where the peak and off peak meter tails had been commoned in a Henly block to supply a single set of tail which fed another Henly block where they were split again to supply their respective consumer units. The electric Aga was running up a huge bill as it was never charging on the “off peak” tariff as it charged after each use. A bit of rewiring dramatically reduced the bill.

It is quite amazing what  installation designs some people come up with, there’s a job I have not got around to going and looking at yet, an electrician doing other work was asked to check out a garage and garden office installation because of RCD tripping issues in the garage, but he said he can’t sort it out because he “cannot find out where they are supplied from”, I guessing it’s from the meter via the main switch and consumer unit, but there’s quite possibly a surprise in store.