Tests must be performed to NZ Electrical Wiring Regulations and the relevant standards. The Metrel Tester can perform these tests in sequence, identifying faults at your home or business you may not know you have. Most tests such as Insulation Resistance require the installation or part of the installation be unpowered but some tests such as effective operation of RCD power outlets can be performed with the power connected. In most modern homes or businesses the only way to periodically check for safety issues is with one of these testers. If you think you have a problem or would simply like to have your premises checked for safety, please call to book an appointment where we can demonstrate this item to you. Peace of mind is invaluable.