A plastic enclosure for enclosing industrial components, the molded plastic enclosure comprising - a case molded from plastics comprising a rear wall and four side walls delimiting an interior, a mouth opening enabling access to the interior, the side walls comprising a first side wall and a second side wall which is parallel to the first side wall,, - a lid molded from plastics for covering the case, the lid being hinged at the side of the first side wall by one or more hinges to be movable between a closed position, wherein the lid covers the mouth opening of the case, and an open position to permit access to the interior, the hinge being located near to the mouth opening, - one or more a latch devices for locking the lid relative to the case in the closed position, the latch device comprising a grip means arranged to the lid and a rocker connected removably and pivotally with a pivot axle relative to the second side wall to be turnable about a single axis (x) between a locking position and a release position, the rocker comprising a hook portion at one side of the pivot axle, which hook portion can grip the grip means, and a handle arm at the opposite side of the pivot axle in relation to the hook portion, the handle arm being arranged to be manually operable for turning the rocker about the pivot axis between the locking and release positions, wherein the grip means is a rigid lug molded to be monolithic with the lid, the lug comprising a through-hole to which the hook portion can grip, the lug being arranged, in the closed position of the lid, to extend over and at a distance from the second side wall to be substantially in parallel with the second side wall to limit an intermediate space between the second side wall and the lug when the lid is in the closed position, and the hook portion is arranged so that, in the release position of the rocker, it is turned inside the intermediate space away from the path of the lug and, in the locking position of the rocker, the hook portion is turned to protrude laterally outwards through the through-hole of the lug, char act e r i zed in that the case comprises a sealing flange defining an outer periphery of the mouth opening; that the lid comprises a groove arranged at the periphery of the lid to receive therein a resilient sealing gasket, to co-operate with the sealing flange when the lid is in the closed position; that the hook portion is arranged to compress the sealing gasket by pressing the sealing flange against the sealing gasket to create a spring force against which the hook portion holds the lug; and that the output force of the hook portion exerted to the lug is amplified by a mechanical advantage provided by a lever effect of the rocker when being turned to the locking position by an input force exerted to the handle arm. - a case molded from plastics comprising a rear wall and four side walls delimiting an interior, a mouth opening enabling access to the interior, the side walls comprising a first side wall and a second side wall which is parallel to the first side wall,, - a lid molded from plastics for covering the case, the lid being hinged at the side of the first side wall by one or more hinges to be movable between a closed position, wherein the lid covers the mouth opening of the case, and an open position to permit access to the interior, the hinge being located near to the mouth opening, - one or more a latch devices for locking the lid relative to the case in the closed position, the latch device comprising a grip means arranged to the lid and a rocker connected removably and pivotally with a pivot axle relative to the second side wall to be turnable about a single axis (x) between a locking position and a release position, the rocker comprising a hook portion at one side of the pivot axle, which hook portion can grip the grip means, and a handle arm at the opposite side of the pivot axle in relation to the hook portion, the handle arm being arranged to be manually operable for turning the rocker about the pivot axis between the locking and release positions,