What ist the difference between the options in “place of installation” when adding a load and what has to be considered in this case?
Depending on the place of installation and the nominal current of the load you have to consider if you have to use an RCD according to the IEC 60364-4-41 standard. The difference between the inner, outer and wet zone is the inclusion of an RCD in the outer zone up to a consumer load current of 32A. Above this current, an RCD is not necessary. In a wet zone, an RCD is always necessary. In case of a consumer in an inner zone, but not a socket-outlet, an RCD is not required (inner zone = indoor, outer zone = outside; wet zone = bathroom for example).
