An installation box for electrical distribution applications, comprising: - a housing suitable to accommodate one or more electrical devices, said housing comprising one or more pieces connected together and being made of electrically insulating material; - a door made of electrically insulating material; - means for connecting the door to said housing ; characterized in that said connecting means comprise: - a plurality of protuberances which are integrally made with and extend outwardly from one of said one or more pieces of the housing towards said door , wherein said plurality of protuberances are configured so as said door is connected therewith rotating about a rotation axis relative to the housing itself and are spaced apart from each other and aligned along said rotation axis , and in that said connecting means further comprise a plurality of connection portions which are integrally made with and extend inwardly from the front face of the door towards said housing , each of said plurality of connection portions being configured so as each engages and forms together with an associated protuberance a hinge-like mechanism, wherein each of said plurality of protuberances comprises a central elbow-shaped part which protrudes transversally from a front part of one of said one or more pieces of the housing , and at least a first pin protruding transversally from said central elbow-shaped portion along said rotation axis and wherein each of said plurality of connection portions comprise at least a first substantially planar fin which protrudes transversally from the front face of the door inwardly towards said housing , a through hole suitable to receive a corresponding first pin being provided on said first planar fin . - a housing suitable to accommodate one or more electrical devices, said housing comprising one or more pieces connected together and being made of electrically insulating material; - a door made of electrically insulating material; - means for connecting the door to said housing ; - a plurality of protuberances which are integrally made with and extend outwardly from one of said one or more pieces of the housing towards said door , wherein said plurality of protuberances are configured so as said door is connected therewith rotating about a rotation axis relative to the housing itself and are spaced apart from each other and aligned along said rotation axis , and in that said connecting means further comprise a plurality of connection portions which are integrally made with and extend inwardly from the front face of the door towards said housing , each of said plurality of connection portions being configured so as each engages and forms together with an associated protuberance a hinge-like mechanism, wherein each of said plurality of protuberances comprises a central elbow-shaped part which protrudes transversally from a front part of one of said one or more pieces of the housing , and at least a first pin protruding transversally from said central elbow-shaped portion along said rotation axis and wherein each of said plurality of connection portions comprise at least a first substantially planar fin which protrudes transversally from the front face of the door inwardly towards said housing , a through hole suitable to receive a corresponding first pin being provided on said first planar fin . <EOS>