Adding line-side barriers to the service overcurrent protective device impacts which component of risk?

Adding line-side barriers to the service overcurrent protective device impacts which component of risk?

• A. Likelihood
• B. Severity
• C. Both
• D. None

Answer: (A)

Line-side barriers mainly reduce the chance of accidental contact with live parts. In risk terms, risk equals likelihood of an incident times the severity if it occurs. By adding barriers, you create a physical obstacle that makes it far harder for someone to reach energized conductors, so the likelihood of an electrical incident is reduced. The severity is determined by the energy that could be released during a fault (fault current, duration, arc energy) and is not primarily changed by the presence of barriers. So the main impact is lowering likelihood rather than reducing the potential consequences.

Line-side barriers mainly reduce the chance of accidental contact with live parts. In risk terms, risk equals likelihood of an incident times the severity if it occurs. By adding barriers, you create a physical obstacle that makes it far harder for someone to reach energized conductors, so the likelihood of an electrical incident is reduced. The severity is determined by the energy that could be released during a fault (fault current, duration, arc energy) and is not primarily changed by the presence of barriers. So the main impact is lowering likelihood rather than reducing the potential consequences.