Laws, courts and authorities
NAV
Abbreviation for Niederspannungsanschlussverordnung
In short and in plain language
The NAV is a German rule on how houses connect to the power grid.
It also says who may work on the electrical system in a house.
This must be a firm that is on a list kept by a grid operator.
Definition
The NAV is the German Low Voltage Connection Ordinance. It governs how buildings are connected to and use the low-voltage power grid. Apart from the grid operator, only an installation company entered in a grid operator's installer register may carry out work on the electrical installation.