In order to guarantee the safety of the employees, all electrical work equipment, stairs, ladders and mobile scaffolding used in operation must be periodically inspected in accordance with the standards NEN 3140, NEN 2484, and NEN 1004. In most cases this concerns an annual inspection. In simple terms, electrical work equipment includes all electrical appliances with a plug that are used in operation. For example, tools, battery chargers, extension cords, but also the computers in the office.