This part of IEC 61439 detines the specific requirements for distribution boards intended to be operaled by ordinary persons (abbrevialed DBO throughout this document, see 3.1.101) as follows:
-assemblies intended to be operated by ordinary persons (e.g. switching operations and replacing fuse-links), e.g. in domestic (household) applications;
– assembles containing outgoing clrcuits with protective devices intended to be operated by ordinary persons, complying e.g. with IEC 60898-1. the IEC 61008 series, the IEC 61009 seres, IEC 62606, IEC 62423 and IEC 60269-3;
-assemblies tor applications where the nominal voltage to earth does not exceed 300 V AC (see Table G.1 of IEC 61439-1:2020);
