Practice question

When troubleshooting a loop, an LCR meter at the pull-box reads about half the expected loop inductance. What is the most likely problem?

  1. A second loop is paralleled by mistake or a saw-cut crossover
  2. The detector amp is overheating
  3. AC line voltage is high
  4. The pedestrian pushbutton is stuck

Answer: A — A second loop is paralleled by mistake or a saw-cut crossover

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