What is an acceptable means of preventing accidental contact with live parts for equipment operating at 50 to 1000 volts?

To prevent accidental contact with live parts for equipment operating at 50 to 1000 volts, placing the equipment in a room or vault is considered an acceptable means of achieving safety. This method effectively restricts access to only trained personnel, which minimizes the risk of accidental contact with energized components. By enclosing the equipment in a dedicated space, additional physical barriers are established that help ensure that unauthorized or accidental entry is prevented.

Using insulated covers is also an effective strategy; however, it primarily serves to protect specific components rather than securing an entire area. While positioning equipment on a dedicated circuit may enhance safety in terms of electrical load management and fault isolation, it does not directly address the risk of accidental contact with live parts. Ground fault protection is an essential safety feature but is not sufficient by itself to prevent physical contact. These methods can complement each other, but situating equipment in a secure location stands out as a primary and comprehensive means of prevention.