What tool does OSHA require for testing existing conditions before working on electrical equipment?

The requirement set by OSHA for testing existing conditions before working on electrical equipment emphasizes the need to ensure that circuits are de-energized and safe to work on. A multimeter is an essential tool for this purpose because it allows technicians to measure voltage, current, and resistance, thereby providing critical data regarding the electrical state of the equipment.

When working with electrical systems, a multimeter can confirm whether voltage is present, which is a fundamental step in ensuring the safety of personnel before conducting any maintenance or repair. It helps technicians verify that the equipment is indeed de-energized, and thus, it plays a vital role in preventing accidents and injuries associated with electrical hazards.

While other tools such as a voltage calibrator, megger, or amp probe serve important functions in specific electrical testing scenarios, they do not directly fulfill OSHA's general requirement to assess the existing electrical conditions as comprehensively as a multimeter does.