#774307
What is the earthing system of the following refers to the system TN?
Варианты ответа:
  • a System in which the power source midpoint wire is insulated from earth or earthed through instruments or devices having a large resistance, and open conductive parts of the electrical installation are grounded
  • a System in which the power source midpoint wire is dully grounded, and open conductive parts of the electrical installation are grounded using the grounding device is electrically independent of the earthed neutral of the source
  • the System in which the power source midpoint wire is dully grounded, and open conductive parts of the installation connected to the earthed neutral of the source by means of protective conductors
Тематика: Основы безопасности жизнедеятельности Основы безопасности жизнедеятельности (ОБЖ) Основы электробезопасности
Курсы в категории: Безопасность и правопорядок
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