CAn anyone tell me what is the purpose of using FUSE & M
- Thread starter novkhan
- Start date
Sorry your question has not been answered by a professional, so here goes.
The supply to my house in the UK is protected by a 100A fuse, installed by the electricity supplier and retained by locking-wire with their tamper-proof seal. This is to protect their underground/overhead cables and only the supplier is allowed to remove this fuse.
A modern system could use an MCB in place of a fuse, they serve the same purpose. The MCB is just easier to reset after tripping. The fuse must be re-wired with the correct gauge fuse-wire or replaced as a cartridge.
The next breaker is an earth-leakage protector (RCD) rated at 63A, so my domestic wiring must not exceed 63A.
The circuit is then sub-divided into loads of 30A (ring main) 15A (water heater) 5A (lighting)etc, all protected by individual MCBs. They could be protected by fuses, but harder to fix by the light of a torch.
The supply to my house in the UK is protected by a 100A fuse, installed by the electricity supplier and retained by locking-wire with their tamper-proof seal. This is to protect their underground/overhead cables and only the supplier is allowed to remove this fuse.
A modern system could use an MCB in place of a fuse, they serve the same purpose. The MCB is just easier to reset after tripping. The fuse must be re-wired with the correct gauge fuse-wire or replaced as a cartridge.
The next breaker is an earth-leakage protector (RCD) rated at 63A, so my domestic wiring must not exceed 63A.
The circuit is then sub-divided into loads of 30A (ring main) 15A (water heater) 5A (lighting)etc, all protected by individual MCBs. They could be protected by fuses, but harder to fix by the light of a torch.
B
breezer
close but no cigar, sorry