Question

Which statement about connecting the bus cables of different lines is correct?

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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)
  1. A.Bus cables from different lines may be connected at the line coupler.
  2. B.Bus cables from different lines may never be connected together.
  3. C.Bus cables from different lines may be connected if the total length stays under 1000 m.
  4. D.Bus cables from different lines must be connected to form a single segment.
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Last updated: 19 May 2026

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