Orbis VIARIS UNI Manual De Usuario página 62

NOTE: To make the electrical connection to the charger, the terminal
cables must be used.
Grounding
For correct operation of the charger, it must be considered that the
grounding installation must comply with the following:
 The type of ground system of our installation is TT, TN(S), or TN(C).
 Voltage between neutral and ground (N-PE) less than 5 Vac.
 Resistance of the ground installation with less than 50 Ω .
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