Final answer:
Employers must guard against electrical hazards and work to ensure employee safety around unprotected live electrical parts over safety threshold voltages typically starting at 50 volts. OSHA guidelines and the NEC provide detailed safety standards on the specific protections required based on voltage levels.
Step-by-step explanation:
Employers must take the necessary precautions to ensure that employees are not exposed to unprotected live electrical parts over certain voltage levels. In general, for voltages over 50 volts special care must be taken to guard against potential electrical hazards. It is essential to note, however, that different standards and regulations may set varying thresholds for safe exposure levels based on the type of electrical equipment and the specific workplace environment.
Considering the safety concerns related to electricity the Occupational Safety and Health Administration (OSHA) in the United States requires employers to protect their employees from electrical hazards including ensuring that live parts are deenergized before an employee works on or near them or are adequately guarded if they must remain energized (29 CFR 1910.333(c)(2)). Detailed OSHA standards and the National Electrical Code (NEC) need to be consulted for precise voltage levels that require protective measures.