Calculator — inspection intervals
Choose the type of installation. If you know the date of the last inspection, the page works out the next due date and the time remaining. The intervals come from the annex to the NIV — and where a use cannot be classified clearly, it says so here too.
Choose the use that comes closest to the property.
It is on the last safety verification certificate. Without a date the calculator only shows the interval.
Choose a type of installation
The result appears here. The calculation runs entirely on your device — nothing is transmitted and nothing is stored.
What this rests on
The ordinance on low-voltage electrical installations (NIV, SR 734.27) sets out in its annex how often an installation has to be inspected periodically. The interval depends on the type of installation and is 1, 3, 5, 10 or 20 years. This calculator covers the cases that are clear-cut, and for the rest it says who decides.
A guide, not a substitute for judging the individual case
This calculator replaces neither a look at the property nor the answer from the responsible inspection body or the grid operator. Uses change, buildings are used for several things at once, and you cannot tell an increased hazard from the address. What counts is the NIV with its annex and the assessment on site — not this page.
Next
A calculator answers for one installation. A business has three hundred of them, and the question is not which interval applies but which installation falls due next month.
That is exactly what elektro.box does in the business: it keeps the installations with their intervals and their deadlines and speaks up while the matter can still be put right. There is no form for that on this page — your result is above, whether you write to us or not.