This course presents information on the theory of operation, applications and installation practices for low voltage and communications systems typically installed in buildings. These include audio, video, security, telephone, fire alarm, computer networking and wireless systems. The National Electrical Code will be referenced throughout this course as it applies to the subject matter. The material presented in this course satisfies NH Electrical Apprentice training requirements. Laboratory work will reinforce and promote the application of theoretical concepts. Prerequisites: ETEC120M and MATH151M or MATH155M or permission of Program Coordinator.