Just finished changing a consumer unit for somebody. It was a fairly
standard job - 2 lights, 2 rings, cooker and immersion circuits. Whilst
testing the R1+R2s, discovered that the upstairs ring had one leg in a
30A BS3036 fuse, and the other in the 15A fuse labelled as immersion. The
immersion itself was connected as the other leg in the 30A fuse.

The board was the original one for the house, which was built
approximately 15 years ago. All good fun!

Just finished changing a consumer unit for somebody. It was a fairly
standard job - 2 lights, 2 rings, cooker and immersion circuits. Whilst
testing the R1+R2s, discovered that the upstairs ring had one leg in a
30A BS3036 fuse, and the other in the 15A fuse labelled as immersion. The
immersion itself was connected as the other leg in the 30A fuse.

Its to provide a backfeed in the event of a fault on the ring :-p

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In article ,
says...
Just finished changing a consumer unit for somebody. It was a fairly
standard job - 2 lights, 2 rings, cooker and immersion circuits. Whilst
testing the R1+R2s, discovered that the upstairs ring had one leg in a
30A BS3036 fuse, and the other in the 15A fuse labelled as immersion. The
immersion itself was connected as the other leg in the 30A fuse.

Its to provide a backfeed in the event of a fault on the ring :-p



I'm just waiting for the complaints to start - 'We used to be able to run
a couple of 3kw electric fires, washing machine, tumble dryer,
dishwasher, arc welder, garage hoist etc, and now the breaker keeps
blowing. What have you done wrong?'