Sanitary installation for a sanitary article, in particular a WC or shower WC, comprising: - a mounting frame; - a flush pipe receptacle for receiving a flush pipe for supplying flush water to the sanitary article; - a mounting means for receiving and securing a drain pipe for draining waste water from the sanitary article to the mounting frame; and - at least a first and a second fastening structure for fastening the sanitary article to the mounting frame; wherein the flush pipe receptacle, the fastening means, and the first and second fastening means define an intermediate space, characterized in that an electrical box for supplying power to the sanitary article is disposed in the intermediate space, wherein the electrical box comprises a housing with an interior space, which is accessible via a front opening, and a partition wall lying in the interior space, which divides the interior space into a first space region and a second space region, and wherein at least one electrical contact element being arranged in the partition wall, which contact element has a first connection point facing the first space region for connection to an electrical installation on the building side, such as a high-voltage installation and/or a building management system installation, and which contact element has a second connection point facing the second space region, and wherein at least one electrical element is further arranged in the second space region, which electrical element has an electrical interface which can be electrically connected to the second connection point of the electrical contact element via a plug connection, and which electrical element can be connected to a sanitary article via a conductor element. - a mounting frame; - a flush pipe receptacle for receiving a flush pipe for supplying flush water to the sanitary article; - a mounting means for receiving and securing a drain pipe for draining waste water from the sanitary article to the mounting frame; and - at least a first and a second fastening structure for fastening the sanitary article to the mounting frame; an electrical box for supplying power to the sanitary article is disposed in the intermediate space, wherein the electrical box comprises a housing with an interior space, which is accessible via a front opening, and a partition wall lying in the interior space, which divides the interior space into a first space region and a second space region, and wherein at least one electrical contact element being arranged in the partition wall, which contact element has a first connection point facing the first space region for connection to an electrical installation on the building side, such as a high-voltage installation and/or a building management system installation, and which contact element has a second connection point facing the second space region, and wherein at least one electrical element is further arranged in the second space region, which electrical element has an electrical interface which can be electrically connected to the second connection point of the electrical contact element via a plug connection, and which electrical element can be connected to a sanitary article via a conductor element.