Test and Tag services Sydney. Sydney Electrical Appliance Testing provides testing and tagging services to AS/NZS 3760 in Sydney and Australia wide. Electrical Testing refers to the safety checking of portable electrical appliances for compliance with Work Health and Safety (WHS) regulations. Tagging and testing is the best way to minimise electrical risks in your workplace from faulty or damaged electrical appliances. Appliances are inpected and then electrically tested and tagged (labelled) to indicate whether they are safe to use.