What is the minimum voltage for a panelboard working space as outlined in electrical codes?

The minimum voltage for a panelboard working space, according to electrical codes like the National Electrical Code (NEC), is 120 volts. This standard is set to ensure safety when technicians and electricians are working on or near electrical equipment. At voltages above this threshold, the likelihood of electrical shock increases, necessitating more stringent safety protocols and clearances around the panelboard.

When considering the minimum voltage of 120 volts, it establishes a baseline for areas where personnel might need to conduct maintenance or troubleshooting. At this level, specific clearances and accessible working space requirements become crucial to minimize the risk of accidental contact with live electrical parts. This regulation underscores the importance of maintaining a safe working environment to protect workers from electrical hazards.

Higher voltages, such as 240 volts, 480 volts, or 600 volts, indicate increased levels of danger, thus requiring additional safety measures beyond what is mandated for 120 volts. These higher voltage levels come with their own sets of regulations to ensure safety but do not define the baseline working space requirements laid out in the electrical codes.