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Therefore, you should connect your BEETLE or other IT-devices only to
power supply systems with separately guided protective earth conductor
(PE). This kind of electricity system is known as TN-S network. Do not use
PEN conductors!
Please also observe the recommendations of the norm DIN VDE 0100, Part
540, Appendix C2 as well as EN50174-2, §5.4.3.Thus you can help to avoid
possible malfunctions.
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IMPORTANT NOTES