The 17th edition regulations which now apply to each new consumer units have enabled client to have a tremendous range of choices over what technique or canrrrt do with their consumer unit. The consumer units are invariably connected with split load design lets 2 complete areas that go back towards same breaker so that only one circuit at an occasion goes aside. There needs to be some thought as which circuits require to be bundled together in which it is preferable not to have lights and ring mains in replacing room on the same split unit to that offer problem where all power goes off together.
The 17th edition insists that clear on the circuits are protected by the RCD or Residual Circuit Breaker given that will protect anybody planet place from getting electrocuted by having a current passing through them from defective circuit as the RCD will kill latest the moment it detects a current loss. These advantages far outweigh the problems, but there exist several problems that occur from using an RCD system along with the can be accommodated or mitigated by some careful thought. The earliest problem simple fact that with any fault that instantly kills the whole system 1 part of this split circuit and stronger leave the area with no light.
A ring main fitted on the other side split service can allow a table lamp to be used which allows full movement. This is particularly useful to elderly people. If the ring circuit is broken that supply's your kitchen area it is quite likely that the freezer system will be cut out and its possible to lose the contents due to your food de-frosting. If the cause of this is a fault during the freezer supply then that obviously needs work however, if the circuit has gone out because a bulb has blown on the electrical circuit there is really an other circuit that caused the problem then it is very annoying. Sometimes it is mitigated by putting the freezer supply onto the split offers least problems or it can be placed on to a complete separate circuit from a distinct unit.
Areas because fire alarms and burglar alarms should be put onto separate circuits to head off being taken coming from commission by faults on other tour.