n GENERAL PROVISIONS:
The exposed conductive parts are interconnected and earthed either altogether or in groups, or individually.
Protection against indirect contact is ensured by RCD having a sensitivity I Dn to meet the condition:
(1) 25 V in damp premises, work site installations and farm buildings.
The choice of RCD sensitivity, which depends on the earth electrode resistance, is given in table.
Table: upper limit of the exposed conductive part earth electrode resistance which must not be exceeded in relation to the sensitivity of the RCD and the limit voltage UL