When selecting a circuit breaker for a panel, you must verify suitability for the panel and what else?

• A. Proper Short‑Circuit Performance
• B. Color Coordination with Panel
• C. Brand Uniformity with Panel
• D. Panel Mounting Height

Answer: (A)

When selecting a circuit breaker for a panel, the key requirement is that the breaker is listed or classified for use in that specific panel and has the proper short‑circuit (interrupting) performance. This means the breaker must be compatible with the panel’s design and able to safely interrupt the maximum fault current the system could experience. If the breaker’s interrupting rating is too low for the panel’s available fault current, it could trip too late or fail catastrophically, compromising safety.

Other factors like color coordination, brand uniformity, or mounting height do not affect the breaker’s electrical performance or safety in the panel, so they aren’t relevant criteria for ensuring proper operation.