Residential properties rely on electrical systems for lighting, power outlets, appliances and other essential services. A Certificate III in Electrotechnology Electrician provides training relevant to electrical installations and systems that can be encountered in domestic environments. Students study areas including low-voltage socket outlet circuits, lighting circuits, wiring systems and electrical installations. The qualification also covers safety procedures and testing requirements. Understanding these areas can help learners build a foundation for future electrical work. However, anyone planning to work as a licensed electrician must also understand the licensing requirements that apply in their state or territory.