Switch-Gear Cabinet¶

The connections between the switch-gear cabinet, the mounting plates, the PE bar and the shield bar must have a low impedance.
Earth the switch-gear cabinet doors with short and highly flexible conductors.
For illumination of the switch-gear cabinet, only use filament lamps (bulbs) or fluorescent tubes with interference suppression to prevent the control system being disturbed.
For supplying the PC, use the mains socket which is located inside the switch-gear cabinet. In this way, all earthing measures are performed with short conductors and no parasitic currents can flow even in case of non-isolated interfaces.