In many environments, electrical testing is a legal requirement. Electricity testing regulations that are relevant to the UK include the Health & Safety at Work Act 1974, the Management of Health & Safety at Work Regulations 1999, the Workplace (Health, Safety & Welfare) Regulations 1992 and the Provision & Use of Work Equipment Regulations (PUWER)1998.
The Health & Safety at Work Act 1974 puts the duty of care upon both employer and employee when it comes to ensuring the safety of all persons using the working environment (this includes the self-employed). The PUWER 1998 covers most of the risks that can result from using work equipment. With regards to risks from electricity, compliance with the Electricity at Work Regulations 1989 is likely to achieve compliance with PUWER 1998.
It is clear that the combination of the HSW Act 1974, PUWER 1998 and the EAW Regulations 1989 apply to all electrical equipment used in, or associated with, places of work. The scope extends from distribution right down to the smallest item of electrical equipment.