TN system - High-sensitivity RCDs

From Electrical Installation Guide

(see Fig. F46)
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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Fig. F46: Circuit supplying socket-outlets

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