Question
Which statement about connecting the bus cables of different lines is correct?
Answer
B — Bus cables from different lines may never be connected together.
Correct: Bus cables from different lines may never be connected together; the check looks for such inadmissible connections.
Source
KNX Basic Course Documentation — 17.3 — p. 118
All proposed choices (exam context)
- A.Bus cables from different lines may be connected at the line coupler.
- B.Bus cables from different lines may never be connected together.✓
- C.Bus cables from different lines may be connected if the total length stays under 1000 m.
- D.Bus cables from different lines must be connected to form a single segment.
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