Question
For primary protection of the 230/400 V AC mains, what minimum nominal discharge current (10/350 us) is required per conductor?
Answer
C — 12,5 kA.
Correct: at least 12,5 kA (10/350 us) per conductor is required for the mains.
Source
KNX Basic Course Documentation — 11 — p. 112
All proposed choices (exam context)
- A.2,5 kA.
- B.5 kA.
- C.12,5 kA.✓
- D.25 kA.
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