Circuit B features are used in home installations. Excluded circuit in case of short circuit or in the case of exceeding the rated current fuse. Placed in the fuse boxes on C-mount.

Fuses and C features are used mostly to protect electric motors, because they have slower reaction of B fuse characteristics. Allow current to pass briefly their rated current (eg during start up of electric motors), but will turn off the circuit if the load continues. It also excludes the case of short circuit.

FID - breakers are protective devices to protect electrical installations in the event of a short circuit or other malfunction installations and appliances (heating boiler breakdown, preilice etc.). For home installations are commonly used 25 and 40-amp circuit breakers with current reactions 0.5 A or 0.03 A, which can be 2-pole (single phase) or 4-pole (three phase). For the bathroom seuglavnom switches used with the current 0.03 A, while for a complete home installation using switches 0.5 A. For proper operation of switches is vital to scratch and earthing conductors are not short-circuited anywhere in the installation.