Portable Appliance Testing is a requisite by Electricity at Work Regulations 1989 that requires electrical systems in Work environments be maintained and kept in safe conditions so as to prevent the risk of electric shock or injury. In order to meet this statutory requirement, electrical inspections and testing must be carried out on all electrical appliances in use at work environment. Employer or person under the duty of care is responsible for meeting this legal requirement.

A quarter of all serious electrical accidents at workplace involve portable appliances. Portable appliances are electrical equipment with leads and plugs that are normally moved around, or can easily be moved from one place to another. There is a legal requirement for employers under the Health and Safety at work act 1974 to take adequate steps to protect user of portable appliances from the hazards of electric shock and fire. The responsibility for safety requirements applies equally to both small and large companies.