What height must live parts operating at 301 - 600 volts be elevated to be considered guarded against accidental contact?

Live parts operating at voltages between 301 and 600 volts must be elevated to a height of 8 ½ feet to be considered guarded against accidental contact. This regulation is in place to ensure safety in environments where individuals may come into contact with electrical equipment.

The significance of the 8 ½ feet height is derived from standard safety practices that aim to minimize the risk of accidental contact, especially in areas where people work or move around frequently. By positioning live parts above this height, the risk of electrical hazards, such as shocks or short circuits, is significantly reduced. This requirement is part of the measures taken by regulatory bodies to ensure compliance with safety standards in electrical work.

Higher voltages generally require more stringent safety measures, which is reflected in the specific height for guarding that has been established. In this context, other heights listed either do not comply with the established safety regulations or are not applicable as standards for live parts in the specified voltage range.