Question
In the sequence for checking a KNX installation, which check is carried out immediately after checking the polarity of all bus devices?
Answer
C — Measuring the bus voltage at each bus cable end
Correct: The polarity check is followed by measuring the bus voltage (minimum 21 V) at each bus cable end.
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An error or unclear wording? Report this questionAll proposed choices (exam context)
- A.Measuring the insulation resistance of the bus cables
- B.The visual check of the bus cable-end marking
- C.Measuring the bus voltage at each bus cable end✓
- D.Recording the test results
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