Which parameter must be verified to avoid exceeding ratings when increasing system load?

• A. Insulation type
• B. Generator capacity
• C. Wire size
• D. Load type

Answer: (B)

When you increase the load on a system, you must verify the generator capacity—the maximum power the generator can reliably deliver. This rating determines how much real and apparent power the source can supply without overheating, voltage sag, or tripping protective devices. If the total load exceeds what the generator can handle (even after accounting for power factor), you’ll push the equipment beyond its safe limits, risking damage and outages.

Other factors matter for different reasons, but they don’t directly define the system’s ability to supply more load. Insulation type relates to preventing electrical breakdown, not how much current the source can safely deliver. Wire size affects how much current the conductors can carry without overheating, which is important, but the central question about avoiding exceeding system ratings is about the generator’s capacity itself. Load type influences how loads behave (start-up surges, transient currents, etc.) but doesn’t set the generator’s maximum rating.