Practice question

What surge protection device should be installed at the entrance of fiber optic cables into a traffic signal cabinet?

  1. Metal oxide varistor (MOV)
  2. No surge protection is needed — fiber optic cables are immune to electrical surges
  3. Gas discharge tube
  4. Transient voltage suppressor (TVS) diode

Answer: B — No surge protection is needed — fiber optic cables are immune to electrical surges

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