Setting up, maintaining, and fixing electrical control, wiring, and lighting systems. Conducting general electrical upkeep. Examining transformers, circuit breakers, and other electrical components. Diagnosing electrical problems using appropriate testing devices. Restoring and substituting equipment, electrical wiring, and fixtures. Carrying out corrective maintenance on circuit breakers. Possessing extensive knowledge of heating and air conditioning systems and various testing equipment. Installing and repairing electrical wiring, systems, and fixtures within buildings. Installing conduits and pipes to accommodate electrical wires and cables. Installing circuit breakers and other electrical hardware, and connecting wiring to them. Connecting electrical systems to powerlines to supply electricity to the building. Testing electrical systems to ensure proper installation and functionality.