What is the intent of a S.C. study or evaluation?

• A. To estimate the operational cost of the equipment.
• B. To check the available short circuit current and compare it to the rating of the panel.
• C. To measure insulation resistance of cables.
• D. To document maintenance history.

Answer: (B)

In a short-circuit study, the main goal is to determine the maximum fault current that could flow at a point in the electrical system and ensure protective devices and equipment can safely interrupt it. The intent is to check the available short-circuit current and compare it to the rating of the panel, so the panel, breakers, and conductors are sized and coordinated to trip appropriately without damage in a fault. This ensures safety and reliability for the system under fault conditions.

Other options miss the core objective: estimating operational cost is about economics, not protection performance; measuring insulation resistance assesses cable condition rather than fault current capability; documenting maintenance history is a record-keeping task, not evaluating electrical interruption capability.