Under which conditions are live parts not required to be deenergized before an employee works on or near them?

In electrical safety practices, live parts are often required to be deenergized to prevent electrical shock and injuries. However, there are specific conditions where this requirement may not apply. When dealing with parts operating at less than 50 volts to ground, the risks associated with electrical shock are significantly lower, as the voltage is considered safe to work on without deenergizing. This is applicable because the standards for electrical safety recognize that lower voltage levels generally provide a safe working environment, provided that proper precautions are taken.

The other conditions listed, such as wearing protective equipment, having a supervisor present, or having specialized training, do not universally eliminate the need to deenergize live parts. While these factors contribute to a safer working environment and can mitigate risks, they do not change the fundamental safety policy that applies to voltage levels above certain thresholds. Therefore, the stipulation regarding the 50-volt threshold is paramount in determining when live parts can be safely worked on without deenergizing.