The revamped open access website – Open UCT (http://open.uct.ac.za/) – allows you to search for past dissertations and theses in various faculties and departments across the University of Cape Town.
Have a look, for instance, at the Faculty of Engineering and the Built Environment, from where you can select the Department of Electrical Engineering. In addition to highlighting a couple of recent submissions, the site also allows you to refine the search parameters, viz. author, subject and year, to narrow down your search further.
It is an excellent and useful resource.
University of Cape Town