The main aim of the study was to assess the perception of teachers and administrators on instructional materials utilization effective teaching of Electrical Installation and Maintenance Works in Technical Colleges of Adamawa State, Nigeria. The study which adopted a descriptive survey research design has two research questions and two null hypotheses. The population of the study was 37 subjects consisting of 13 electrical installation and maintenance works trade teachers and 24 administrators of the three Technical Collages in Adamawa State. Mean and t-test were used to answer the three research questions and test the null hypotheses of the study at 0.05 level of significance respectively. Findings of the study revealed that Instructional materials such as electrical drawings for residential wiring diagrams, recorded compact disc, filmstrips, computers, audio players, microphones and televisions are available for teaching and learning of electrical installation and maintenance works trade. The study further revealed that the attitude of teachers toward the use of instructional materials includes: poor selection of relevant instructional materials, and non-application of instructional materials for lesson delivery. Based on the findings of the study, government should provide relevant and more additional instructional material for the teaching and learning of electrical installation and maintenance works trade in all the Technical Colleges; and Ministry of education should sensitize teachers on how to select relevant instructional materials and its implementation in lesson delivery for effective teaching and learning of electrical installation and maintenance works trade in all the technical colleges.