AS/NZS 3551 Relevant Legislation
In Australia and New Zealand there is a requirement for in-service electrical inspection and testing. See below an extract from the Foreword of AS/NZS 3760: 2010/2022.
‘In-service testing is a necessary part of any safety program to help ensure the safety of persons using electrical equipment in the workplace. This Standard specifies in-service safety inspection and testing protocols and criteria that satisfy these obligations, and provides a cost-effective approach to safety without jeopardising personnel safety or involving excessive equipment downtime’.
You should also be aware that Work Cover, OSH and other Regulatory Bodies may have other requirements over and above.