Circuit Protection in the House - Checklist

Circuit Protection in the House - Checklist


In a modern house, there are usually three different circuit protection circuits. Each one can cut off the power by means of a protective shutdown.

There is a safeguard between the terminal, ie a lamp or an electrical appliance, and the line through which the power company supplies the power. The main fuse is located directly on the meter. It typically shuts off the circuit when more than 25 amps of current is flowing.

Circuit fuses

The fuses are located in the circuit breaker and trip at 16 amps. The distributor is mostly in the apartment. The residual current circuit breaker (RCCB) is also housed there. It triggers when more than 30 milliamperes flow in areas where there is no power.

If the electricity in the house fails, this order of verification makes sense:

  • Check if there is power in other rooms.
  • If there is power, look for the appropriate fuse in the sub-distributor and set the toggle switch to "On."
  • If no fuse is off, check and switch on the FI switch.
  • If power is immediate If the power fails in all rooms, check whether there is power in other houses.
  • Turn the anti-tip device on again - or the FI switch -
  • If the failure affects only one house, have the fuses at the meter replaced by the electrician.
  • Reasons for power failure in the house or apartment

The fuses are installed for a good reason. They prevent cables from being spattered by overloading and causing fires or harming people by an electric shock. Triggering can also have harmless causes. A frequent trip is always a reason to have an electrician check the wiring and equipment.

The following things can trigger a power fuse:

Fuse trips when many devices are connected. Lines are too weak or there are too few circuits.

  • The fuse is triggered suddenly when a device or a lamp is switched on. The device is defective.
  • The FI switch trips. Indication of a defect in the electrical installation or in a device which has to be checked by an electrician.
  • Main fuse triggers if large loads are switched on at the same time in many rooms. Presumably a defect of the housing fuses, since the removal takes place over different circuits.
  • Main fuse triggers, although the causes mentioned are not present. Electricians must check the housing fuses, they probably do not trigger correctly.
  • In case of doubt call the specialist

Do-it-yourselfers should never prevent tripping by using stronger circuit protection. An electrician has to measure the installation.

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