#774887

#774887: What group on electrical safety does have to have allowing to work in electroinstallations?

What group on electrical safety does have to have allowing to work in electroinstallations?
Варианты ответа:
  • In electroinstallations up to 1000 V - a third, and in electroinstallations it is higher than 1000 V - the fourth
  • In electroinstallations up to 1000 V - the fourth, and in electroinstallations it is higher than 1000 V - the fifth
  • In all electroinstallations - a third
  • In all electroinstallations - the fourth

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Тематика: Монтаж электрооборудования Основы электротехники Электрические и электронные аппараты
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