Writes for building operators, specialist consultants and thermal imaging operatives engaged in thermal imaging of low-voltage electrical systems up to and including 1000 V ac. The aim of the Guide is to give guidance in determining what can be done in relative safety and in particular to meet the requirements of Regulation 4 (3) of the Electricity at Work Regulations (EAW Regs.) Gives some guidance in determining what can be done in relative safety and how a thorough and rigorous assessment as required by the Management of Health and Safety at Work Regulations should be undertaken.