Replace your old fuse box with a new
consumer unit in a day.
The latest models include two separate
RCDs to protect against shocks and fire. Having two RCDs means the circuits can
be divided between them - for example upstairs lights on one RCD, and
downstairs lights on the other - so that if one trips, you don't have all the
lights go out. The photo shows a typical consumer unit to be fitted.
As part of the installation, all the
circuits are tested for faults, and a full certificate with test results
provided - you will need a certificate if you ever come to sell your house.