The current testers used in electrical circuits up to 1000 V should meet the new IEC/EN 61243-3 (DIN 0682-401) standard. The new standard represents at international level the criteria for testing and safety - remarkably enhancing the user safety.

An essential safety aspect of the international standard requires that voltage testers which load the measuring point with an operating current higher than AC 3.5 mA or DC 10 mA either have to be equipped with a push button on each test probe to activate the measurement or with a protective cap in order to protect the contact electrodes against accidental contact.