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Test and Tag - What requires testing?

Ummmm USB tested?

What when why ?

When you choose to comply with Health and Safety regulations, make sure that you are getting value for money.
Every now and again I come across some, interesting shall we say, interpretations of the NZ3760 Standards. (Note: USB leads do NOT need to be tested)

Ensure your testing company knows what they are testing, why they are testing it and how often the appliance needs to be tested. The standard allows for variance in re-test periods based on the risk to the appliance or lead of being damaged in any way. For example, an extension lead on a construction site needs re-testing every 3 months, however a lead in an office situation can be re-tested once every 12 months.
A fridge whose lead and plug is nicely tucked away behind itself can be given a 5 year re-test period, but a fridge whose lead stretches across the bench where it can be damaged by a knife or other object must be re-tested every 12 months.
All appliances, if they are connected to the wall via a plug, must be checked for safety at relevant time-frames. Chargers to radios to arc-welders and everything in between. At first thought you could be forgiven for thinking that mundane lamp on the desk has no risk associated with it. However the environment it sits in almost always, has an element of risk of damage to it. 
Side tables pushed up against the plug can damage the plug, UV damage from the sun can perish materials, knives, vacuums, regular movement etc. can all cause stress to the leads creating a hazard.

Workplace safety does not need to cost your company an arm and a leg to have a competent job done, and is a proven tool to ensure your most valuable asset, your employees, are protected from harm.