When specifying equipment as requiring internal arc fault capability, an objective assessment should consider:
: Ensuring that operators standing near the equipment are protected from hot gases and debris during a fault. iec 61641 pdf
| Protection Class | Key Protection Focus | Suitability for Further Service | | :--- | :--- | :--- | | | Personnel Protection. Minimizes risk of injury to operators nearby | Equipment may be damaged or destroyed | | Class B | Personnel Protection & Damage Containment. Arc damage limited to a specific part | Equipment can still be used, but functionality may be impaired | | Class C | Personnel Protection & Limited Further Service. Equipment sustains damage but is still functional | Equipment remains usable after the event | When specifying equipment as requiring internal arc fault