Electrical installations

Electrical installation work and electrical appliances together form the electrical installation of a property. The correct placement and use of electrical appliances as well as the maintenance of electrical appliances and fittings are key issues in terms of safety. Electrical installations are subject to wear and tear and require monitoring, maintenance and repairs.


Dirt, dust or humidity accumulated on parts of an electrical installation increase the risk of electric arcing and fire. Mechanical damage, such as damage to box casings or wiring, results in the risk of an electrical accident.


Some electrical installations in a property may be very old and not fully meet the electrical safety requirements set for new installations. Old installations do not, however, need to be altered if they meet the requirements in force at the time they were installed and there have not been any changes in the installation circumstances or environment. Old installations can be replaced and expanded through measures such as adding wall sockets and light fittings instead of using extension leads to connect appliances to the network.


When you need electrical installation or repair work… 

  • Make sure the service provider or the subcontractor used by it is qualified to perform electrical work. To check this visit the Tukes operator register.
  • Always sign a written agreement detailing the work to be done. This will help ensure all the work you ordered will be performed and make liability issues clearer.
  • Make sure the electrical contractor inspects the installations before they are taken into use.
  • Make sure you will receive all the necessary installation drawings and user instructions.
  • Ask the contractor for an inspection record of the commissioning inspection of the electrical installations. This, however, is not needed for very small installation jobs such as an added wall socket. The inspection record is an assurance by the contractor that the electrical work was performed in compliance with electrical safety regulations.


The Home electrical appliances maintenance guide (in Finnish) tells you how a layperson can monitor the condition of electrical installations and how you can check whether there are defects in the electrical installations of your home or other property that can be detected visually. The holder of the electrical installation is responsible for ensuring that installations and appliances are safe and remain safe to use.

  • Make sure the environment in which your electrical installations are used remains compliant with relevant guidelines.
  • Make sure the condition of your installations is monitored and maintained as appropriate.
  • Have any defects observed in an installation repaired immediately.
  • Make sure you learn enough about your appliances and installations, including:

    • Where is the main switch?

    • How can you de-energise the installation fully or in part?

    • Where can you find the fuses and other protective equipment protecting the different parts of the installation?

    • Make sure you have access to the electric diagrams and installation, maintenance and user instructions of your installations.
  • Never attempt any DIY installations. Always use a professional for electrical work.

For safety reasons the only work an ordinary electricity user is allowed to do are certain small jobs that you can read more about under the "Do-it-yourself" section and the Home electrical safety guide (in Finnish). Any electrical work proper must be performed by a professional contractor.