The apartment is a high rise building that is needed by the upper class society as a place to live in an area. As a place to stay for the upper class, of course, comfort and security becomes an absolute thing that must be provided so that residents can feel comfortable in the activity. Comfort and security will arise from the Facilities and other supporting facilities, one of which is the installation of electricity in the apartment. Electrical installation systems in apartments include artificial lighting, socket-outlets, power distribution, land systems, and building protection from lightning strikes. Therefore, in order to avoid excessive and ineffective installation system, it can be done the design of electrical installation system in the apartment in detail. With the design of the first will be known electrical load subscription on the PLN and generator capacity to be used.