To avoid high frequency interference on the production machine is a Earth potential of 5 ohm necessary therefore we have a total of 60 meters Earth pin on 3 places.

Commissioned by the city of Venlo is a ground pin to the event Cabinet in accordance with NEN 1010 Lomm (less than or equal to 165 ohm resistance because of an RCD of 30mA). The ground pin is measured with a Fluke 1653 installation tester.