Electrical inspection

For a flat or a family house that its owner lives in, the law sets no periodic inspection interval — § 13(7) of Act No. 124/2006 Coll. exempts them from the duty. Five years is the interval for a masonry residential building; in an apartment building it applies to the communal areas and risers, and the owners’ association or the property manager arranges it. Whoever has concluded a connection contract, however, must give the distribution operator the inspection report within 90 days of being asked (§ 39(9) of Act No. 251/2012 Coll.). The intervals for other buildings are in the inspection interval tables.

Periodic inspections must be arranged by employers and businesses, and in an apartment building by the owners’ association or the property manager for the communal parts (§ 2 and § 13(7) of Act No. 124/2006 Coll.). Depending on the type of building, inspection results go with the application for building approval (§ 66(2)⁠(h) of Act No. 25/2025 Coll.). When the main breaker changes you must have an inspection report, and the distribution company (SSD, ZSD or VSD) may ask for it.

For an owner-occupied flat, Act No. 124/2006 Coll. does not require one (§ 13(7)), and building work that does not change how a building is used needs no approval (§ 66(1) of Act No. 25/2025 Coll.). Standard STN 33 2000-⁠6, however, expects an initial inspection after an installation is extended or altered, and when the main breaker changes you must have an inspection report. We therefore recommend an inspection after rewiring.

By the protection level a risk assessment sets, once every one to four years. The intervals, what the inspection covers and what it costs are on the lightning protection inspection page.

In the regulations an inspection is called an expert examination and test (OPaOS in Slovak). The content of its report is set by § 16(2) of Decree No. 508/2009 Coll. Among other things, the report gives the inspection technician’s name with the scope and registration number of their certificate, the measurements including the number of the instrument used, the defects found and how serious they are, proposed measures to remove them, and the technician’s signature. All the particulars, and what the verdict of a report means, are on the inspection report page.

It can, but not automatically. It may reduce the payout proportionately if the insured knowingly breached a duty and that substantially contributed to the damage or its extent (§ 809(2) of the Civil Code); under some policy terms it may refuse it. For a direct lightning strike, some insurers do not pay if the required lightning protection was not installed and working.

Yes. We check the electrical installation, the contractor’s work and the materials used — independently, on the investor’s behalf.

Yes. We inspect electrical appliances and portable power tools to STN 33 1630, the standard for equipment that is already in use. Until 1 May 2027 the earlier STN 33 1610 for appliances and STN 33 1600 for power tools still apply beside it. Appliances that come with a tenancy fall into group A: they are inspected when the property is handed over and every two years after that. Otherwise the interval follows the group the appliance or tool belongs to by the way it is used, and we work that out with you.

Yes. We inspect an existing system and measure its earthing resistance; where there is none, or the one there no longer does its job, we build it — the air termination on the roof, the down conductors and the earth electrodes, to the STN EN IEC 62305 series. The protection level does not follow from the kind of building but from an assessment of the risk, so that is where it starts. In a block of flats the lightning protection, and the surge protection of the rising mains with it, is the manager's or the owners' association's business rather than an individual flat owner's.

It depends on the size of the flat or house, and for lightning protection on the number of down conductors. Indicative prices for a flat and a house are in the tables above, those for lightning protection and other work in the price list. We tell you the exact price before the inspection.

Yes, both their electrical part and their safety. On the doors’ electrical equipment, meaning the drive, the power supply and the protective devices, we carry out the inspection and test and issue an inspection report. We check that the doors are safe in use to STN EN 16005: the sensors, the closing forces and the emergency opening. You receive the result of that check in a test record.