In addition to the Declaration of Conformity, signed by a qualified technician (plumber, boiler technician, electrician, etc.), the design of the electrical system must be carried out by an engineer enrolled in the professional registers, in the case of residential units over 400 square meters ( 200 square meters if it is a commercial space, such as shops) or if the power of the meter exceeds 6 kw. It 's always mandatory for pools, rooms used for medical and wellness centers.
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