Question
How should flush-mounted bus devices be fixed in the wall box?
Answer
D — In wall boxes suitable for screw mounting; clamp mounting is usually not possible.
Correct: only wall boxes suitable for screw mounting may be used.
Source
KNX Basic Course Documentation — 9 — p. 109
All proposed choices (exam context)
- A.By clamp mounting, which is the normal method for bus devices.
- B.Screw or clamp mounting; either works equally well.
- C.By gluing the device into any available box.
- D.In wall boxes suitable for screw mounting; clamp mounting is usually not possible.✓
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