Box for cables comprising: a first box portion and a second box portion distinct from each other that, in combination, define a closed space; a hinge assembly, having a hinge axis parallel to an axial direction, that hinges the first box portion to the second box portion so that said closed space is accessible by a relative rotation of the first box portion and the second box portion around said hinge axis; wherein the hinge assembly comprises a tab integral with the first box portion, a first hinge portion integral with the second box portion and a second hinge portion integral with the first box portion; wherein the tab comprises an appendage elastically deformable having a free end, an activating part of the tab configured for being operated by a user being provided at said free end for elastically deforming the appendage; wherein the first hinge portion and the second hinge portion are rotatably connected to each other along the hinge axis through a pintle; wherein the tab, the first hinge portion and the second hinge portion succeed along the axial direction with the first hinge portion positioned between the tab and the second hinge portion; wherein the tab is movable between a rest position, wherein the tab prevents the first hinge portion from sliding along said axial direction relative to the second hinge portion and wherein the appendage is in an undeformed condition, and a release position, wherein the first hinge portion is slidable along said axial direction relative to the second hinge portion and wherein the appendage in a elastically deformed condition; wherein the tab is configured for being moved from the rest position to the release position by operating the activating part; characterised in that during the elastic deformation of the appendage, the free end substantially rotates around a deformation axis lying substantially parallel to the hinge axis. a first box portion and a second box portion distinct from each other that, in combination, define a closed space; a hinge assembly, having a hinge axis parallel to an axial direction, that hinges the first box portion to the second box portion so that said closed space is accessible by a relative rotation of the first box portion and the second box portion around said hinge axis; wherein the hinge assembly comprises a tab integral with the first box portion, a first hinge portion integral with the second box portion and a second hinge portion integral with the first box portion; wherein the tab comprises an appendage elastically deformable having a free end, an activating part of the tab configured for being operated by a user being provided at said free end for elastically deforming the appendage; wherein the first hinge portion and the second hinge portion are rotatably connected to each other along the hinge axis through a pintle; wherein the tab, the first hinge portion and the second hinge portion succeed along the axial direction with the first hinge portion positioned between the tab and the second hinge portion; wherein the tab is movable between a rest position, wherein the tab prevents the first hinge portion from sliding along said axial direction relative to the second hinge portion and wherein the appendage is in an undeformed condition, and a release position, wherein the first hinge portion is slidable along said axial direction relative to the second hinge portion and wherein the appendage in a elastically deformed condition; wherein the tab is configured for being moved from the rest position to the release position by operating the activating part; characterised in that during the elastic deformation of the appendage, the free end substantially rotates around a deformation axis lying substantially parallel to the hinge axis.