IT system - High-sensitivity RCDs

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According to IEC 60364-4-41, high sensitivity RCDs (≤ 30 mA) must be used for protection of socket outlets with rated current ≤ 20 A in all locations. The use of such RCDs is also recommended in the following cases:

  • Socket-outlet circuits in wet locations at all current ratings
  • Socket-outlet circuits in temporary installations
  • Circuits supplying laundry rooms and swimming pools
  • Supply circuits to work-sites, caravans, pleasure boats, and travelling fairs
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