Assessing the frequency of testing

The Health & Safety Executive offers no absolute rules on the frequency of the testing and inspection of portable appliances. The Memorandum of Guidance on the Electricity at Work Regulations suggests that 'regular inspection of equipment is an essential part of any preventative maintenance program', but no attempt is made to specify the intervals of time implied by the word 'regular'. The reason for this omission is obvious; different situations require different measures in order to meet the requirement that the danger is prevented. The factors which effect the frequency of testing must be assessed by the duty holder who thereby makes the judgement.

In arriving at a judgement as to the frequency of testing, a duty holder is likely to assess the following factors:-