Oulun Energia logo
The thumb and index finger turn the fuse switch.
The thumb and index finger turn the fuse button. The fuse box is white.

Blown fuses

A complete or partial outage of electricity in your apartment may be due to blown fuses protecting the electricity connection or the property network. You can replace the fuses that are inside the apartment distribution panel. Check the fuse sizes in your apartment, and buy a few spares of each fuse size.

The fuses can be found in the technical utility room of an apartment or in a distribution panel in the hallway with the main fuses, main switch, electricity meter, and fuse blocks.

Particularly in apartment buildings and terraced houses, there is often a switchboard located outside the apartments. In this case, there is a separate distribution board, or fuse panel, inside each apartment, which contains an apartment-specific main switch and fuse blocks.

Replacing a fuse block

If some of the wall sockets and electrical devices are still working, it may be a sign of a blown fuse block. If the fuse is blown because of a faulty electrical appliance, or you suspect there is a fault in your electrical equipment, turn off the device immediately and take it to a specialist for repair if necessary. An overload can also cause a fuse to blow.

Replacing the main fuse

In high load cases, such as when the temperature is at its lowest, such a large current may flow through the main fuse that the fuse blows. In this case, at least part of a connection will be left without electricity. Therefore, it is advisable to avoid the simultaneous use of high-powered electrical appliances, such as an electric oven and heater, when the temperature is at its lowest.

Main fuses are connection-specific, so if one blows, it does not affect the electricity distribution of other connections in the area.

If a fuse blows repeatedly

If a main fuse blows repeatedly, the fuse size of your electricity connection is too small or the load is unevenly distributed over the fuses. If a new fuse blows immediately after replacement, the fault is in the wires or electrical equipment. In order to solve the matter, we recommend that you contact an electrical contractor, who will make the necessary repair and determine the total load on the connection and the possible need to increase the size of the main fuse of the connection.

We charge an additional connection fee for increasing the size of a main fuse, which is the difference between the connection fees for the current fuse size and the new main fuse size if the wiring does not need to be replaced. For larger modifications, you can ask for a separate price estimate from our technical support.

Permissible loads for the most common household fuses:

Current rating of the fuse Permissible load Color
6 A 1,400 W green
10 A 2,300 W red
16 A 3,700 W grey
20 A 4,600 W blue
25 A 5,750 W yellow
35 A 8,050 W black