Electricity and energy Engineering and engineering trades Electricity and energy is the study of installing, maintaining, repairing and diagnosing faults in electrical wiring and related equipment in domestic, commercial and industrial establishments. Installation and maintenance of overhead and underground electrical power distribution networks is included. Energy is the study of energy generation. Programmes and qualifications with the following main content are classified here: - Air-conditioning trades - Climate engineering - Electrical appliances repairing - Electrical engineering - Electrical fitting - Electrical power generation - Electrical trades - Energy studies - Gas distribution - Heating trades - Nuclear, hydraulic and thermal energy - Power line installation and maintenance - Power production - Refrigeration - Solar power - Wind turbines The study of installing, diagnosing faults in and repairing heating, air-conditioning and refrigeration equipment is included here. Study of vehicle electrical systems is excluded from this detailed field and included in detailed field 0716 'Motor vehicles, ships and aircraft'.