Electrical Fuse box

Hello Brian The Crabtree Starbreaker Distribution Board 380030 would probably be a split load board with an RCCB this is the equivalent of a Residual Current device RCD and should have a yellow test button on the front? it will also state the rating Possibly 80 Amp 30mA this covers Earth Leakage and Miniature Circuit Breakers MCB's these cover any over current If this Fuse Box as you call it is working alright you probably do not need to change it at all. If on the other hand you need individual RCBOs a Residual Current Breaker with Overload protection (both an RCD and MCB in one unit) you will need a complete new Distribution Board hope this helps Kelvin

All circuits needs to be protected by either RCD or RCCB. If your consumer unit(fusebox) hasn't got that -it is a square device with either yellow or green test button,and you have a spare 2 ways,then this could be added,instead of changing the whole consumer unit. This will be less expensive than changing the MCBs with RCBOs.

Yes, crabtree RCBO's can be fitted in place of your existing MCB's quite easily