Why Do You Need a Short Circuit, Coordination, and Arc Flash Study?


A short circuit and coordination study is critical for the safe, efficient, and economical operation of any electrical distribution system. A short circuit study will help to ensure that personnel and equipment are protected by establishing proper interrupting ratings of protective devices (circuit breaker and fuses). If an electrical fault exceeds the interrupting rating of the protective device, the devastating consequences include injury, damaged electrical equipment, and costly downtime.

A coordination study maximizes stable power system operation by isolating faults to the nearest protective device, as well as helping to avoid nuisance operations due to transformer inrush or motor starting operations.

Though sometimes overlooked, NFPA 70B maintains that a short circuit and coordination study is a very important step after the initial design and before the implementation of an electrical distribution system. The NEC also addresses the importance of this type of study in articles 110.9, 110.10, 240, and 517.17. It is clear that a third party, independent study performed during/after the equipment submittal process, can prove to be invaluable.

At SDM Metro, our full service electrical engineering staff will evaluate your existing electrical infrastructure and conduct a coordination study that will include short circuit, protective coordination, and arc flash analysis. Our certified, licensed engineers will create and install arc flash labels on all associated equipment reflective of the findings in the study.

Here is a sample SSCAF report:  Sample SCCS with AF Report