There are different types of electronic devices used within consumer units. In these pages, we explain the main types, advantages/disadvantages and when they are used.
We discuss miniature circuit breakers (MCBs), residual current devices (RCDs), residual current breaker overcurrent (RCBOs), surge protection devices (SPDs) and finally arc fault detection devices (AFDDs). Below is a brief summary of the jobs they do:
| Device | Protects Against |
|---|---|
| MCB | Overload & short circuit |
| RCD | Electric shock |
| RCBO | Both |
| SPD | Voltage surges |
| AFDD | Arc faults/fire |
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