Unfortunately I see the issue from a completely different side. I can’t seem to understand why someone would spend $30K or more on a camper and even $80k or more on a caravan and then think he is being ripped off by the government or others to have their extension cord tested and tagged. Even a newly purchased one could be defective without you knowing it. When you take your cord to whoever, before handing over your lead and cash, ask to see the person’s Electrical licence card. Even those who have done the competency course to do this work should have a card. If they don’t move on.
It is not about trying to scam you out of $15, but having a tested extension cord goes somewhat to protecting your safety, that of your family and those who may be close vicinity to your camper or caravan. A small price I think. To go one further, on your way home, call into Bunnings or whoever and buy a power point tester for $10. Put it on the end of your cable each time you roll it out and make sure the indicators tell you that it is ok.
Recently a family were putting up their Jayco camper across from us when every time the dog touched the step, it would yelp and do tail spins. At first, the family thought it was funny until I asked if I could do a quick measurement. Sure enough the earth was completely open and from the van chassis to earth was about 100 volts. This voltage comes from the way most switching power supplies (the SETEC in Jaycos for example) get rid of the noise on the line to ground. It is very small current and when an earth is present, it isn’t even there. I was really grateful that rather than give me an earful, they went straight out and bought a new lead. Should the fridge or some other appliance developed an earth fault over night the full 240 volts would be present on the chassis. When you step out in the morning with one foot on the step and one on mother earth, you will complete the circuit to earth and hopefully in less than 200 milliseconds the power will be cut. If you had a dicky ticker before now and didn’t know it, unfortunately this will not help.
I have a Restricted Electrical license issued in QLD but so tight are the regulations here, that I can only do testing and tagging and disconnecting of power for equipment owned by my employer. I doesn’t allow me to test and tag my own lead. But still we will have a duty of care to those around us even when we are not at work. Grasp this issue, get your own lead tested and then when you go to the next park, ask if they promote this and if not, why not.
John