Trevor Wrightson worked in Power Stations for over 40 years, 30 of those years as an Electrical Supervisor. After retirement from the Electricity Commission of New South Wales he t...mehr sehenTrevor Wrightson worked in Power Stations for over 40 years, 30 of those years as an Electrical Supervisor. After retirement from the Electricity Commission of New South Wales he taught Electrical Theory to Electrical Apprentices and Tradesmen for a further five years.weniger sehen