Test & Tag Frequency Explained
In New Zealand the test and tag frequency, otherwise known as intervals, refers to how long is needed before an electrical appliance must be tested and tagged.
The NZS 3760 Standard makes recommendations for electrical testing and tagging frequencies via ‘Table 4’, a sort of 'bible' for everything test and tag related. It should be seen at the very least as a minimum requirement.
Here are the main intervals in NZ you should be aware of:
||construction, building and demolition
|factories, production and warehouse
||where equipment/cord is prone to flexing (or open to abuse) i.e. schools, offices, office kitchen
||where equipment/cord is not prone to flexing (or open to abuse) i.e. server rooms
For hire equipment, the electrical equipment needs to be inspected prior to being hired, as well as being tested and tagged every three months.
AS/NZS 3760 Standard - Table 4
In the New Zealand Standard AS NZ 3760, it specifies that the amount of time between using a PAT tester is based upon the type of environment that appliance is located in.
It's also important to remember that some businesses undertake their own risk assessment. This means they might have a different test and tag frequency which is more frequent than what's specified. This is of course absolutely fine, whereas testing less frequently is not acceptable.
Frequency for building, construction and demolition
The most strict of all industries require testing every three months due to their sheer hostility. These include people working on building and construction sites or demolition.
A lot of the information relating to these environments fall under the AS/NZS 3012 Standard. In addition to stricter intervals, you're also required to use particular test and tag colours at certain times of the year in NZ. These colours will change every three months, coinciding with your periodic testing.