BAS EN 61439-3:2013

IEC 61439-3:2012 defines the specific requirements for distribution boards intended to be operated by ordinary persons (DBO). DBOs have the following criteria:<br /> - intended to be operated by ordinary persons (e.g. switching operations and replacing fuse-links), e.g. in domestic (household) applications;<br /> - outgoing circuits contain protective devices, intended to be operated by ordinary persons, complying e.g. with IEC 60898-1, IEC 61008, IEC 61009, IEC 62423 and IEC 60269-3;<br /> - rated voltage to earth does not exceed 300 V a.c.;<br /> - rated current (<i>I</i>_nc) of the outgoing circuits does not exceed 125 A and the rated current (<i>I</i>_nA) of the DBO does not exceed 250 A;<br /> - intended for the distribution of electrical energy;<br /> - enclosed, stationary;<br /> - for indoor or outdoor use. <br /> This first edition cancels and replaces the first edition of IEC 60439-3 (1990), Amendment 1 (1993) and Amendment 2 (2001). It constitutes a technical revision. This edition includes the following significant technical changes with respect to IEC 60439-3 (including the amendments):<br /> - alignment with IEC 61439-1:2011. <br /><br />This publication is to be read in conjunction with <a href='http://webstore.iec.ch/webstore/webstore.nsf/ArtNum_PK/45415'>IEC 61439-1:2011</a>. The contents of the corrigendum of September 2013 have been included in this copy.