At what maximum voltage is guarding required against accidental contact?

Guarding against accidental contact is required for voltages at or above 50 volts. This threshold is based on the understanding that voltages lower than 50 volts are generally considered less hazardous since they are less likely to cause physiological effects that could lead to serious injuries. The 50-volt limit is a recognized standard in both the construction industry and electrical safety regulations, ensuring that adequate protection measures are implemented to prevent electrical shocks and injuries in environments where workers may come into contact with electrical components or systems. This regulation helps to safeguard the health and safety of individuals working around electrical installations, thus promoting a safer work environment in construction settings.