Question

May a cable intended for mains installation be used to wire the KNX TP network?

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Answer

B — No, cables intended for mains networks may not be used for TP networks

Correct: The documentation prohibits reusing mains cable for TP installation.

Source

KNX Basic Course Documentation — 1.1 — p. 97

All proposed choices (exam context)
  1. A.Yes, any cable rated for 230 V is suitable for the bus
  2. B.No, cables intended for mains networks may not be used for TP networks
  3. C.Yes, provided the cable is green
  4. D.Yes, but only in dry rooms
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Last updated: 19 May 2026

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