What is the minimum voltage that requires guarding energized parts against accidental contact?

The minimum voltage that necessitates guarding energized parts against accidental contact is 50 volts. This threshold is established based on safety regulations and standards, which indicate that voltages at or above this level can pose a significant risk of electric shock or injury to individuals who may come into contact with the energized parts.

When voltages exceed 50 volts, the potential for dangerous electrical current passing through a person’s body increases, making it essential to implement safety measures, such as barriers or guards, to prevent accidental contact. This is particularly important in environments where people may be working or moving near electrical equipment, as inadvertent contact can lead to serious injuries or fatal outcomes.

Standards in electrical safety, such as those set forth by OSHA and the National Electrical Code, are designed to protect workers and the public from electrical hazards, and by recognizing 50 volts as the critical threshold, these regulations help to ensure that proper guarding and safety protocols are in place to mitigate risk.