Annex B (normative)
Application of IEC 60204-1:2016/A1: 2021 for generating sets
B.4 Protection against electric shock
B.4.1 Protection against indirect contact
B.4.1.1.2 Protection by automatic disconnection of supply
When a protection by differential current is needed or imposed as complementary protection, only residual
differential devices not exceeding 30 mA shall be used.