LV distribution
In a building, the connection of all metal parts of the building and all exposed conductive parts of electrical equipment to an earth electrode prevents the appearance of dangerously high voltages between any two simultaneously accessible metal parts.
Neutral earthing arrangements are chosen according to local regulations, constraints related to the power-supply, and to the type of loads. The distribution equipment (panelboards, switchgears, circuit connections, ...) are determined from building plans
and from the location and grouping of loads. The type of premises and allocation can influence their immunity to external disturbances. This chapter covers earthing schemes, installation systems, external influences according to IEC 60364-5-51
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