Hi I have a ground floor maisonette built in the late 1960's. The wiring is grey PVC stranded and is generally in good condition. My question is, can I update the fuse box (black hard plastic fuse type) with MCB/RCD's without having to replace all cabling for ringmain & lighting.
The property also has electric underfloor heating on economy seven (installed in the late 1960's). This has a seperate fuse box, & thermostats on wall in 4 rooms that all work but look dated, I would also like to update this system replacing the thermostats & install new fuse box.
Light swithces & roses have been renewed so have the power sockets which are below 450mm but have all been replaced with new faces.
The main fuse boxes do not have any way to isolate from main incoming cable from meter, there is also no isolation prior to the meters except a tagged fuse holder looking thing above the main incoming cable.
Is it common for electricians to work on these live to replace fuse box or does the power need to be de-energised via the electrical supply company beforehand?