BS IEC 62873-3-3:2022

Residual current operated circuit-breakers for household and similar use. Specific requirements for devices with screw-type terminals for external untreated aluminium conductors and with aluminium screw-type terminals for use with copper or with aluminium conductors | Status: Current

1 Scope This part of IEC 62873 applies to devices equipped with screw-type terminals of copper – or of alloys containing at least 58 % of copper (if worked cold) or at least 50 % of copper (if worked otherwise), or of other metal or suitably coated metal, no less resistant to corrosion than copper and having mechanical properties no less suitable – for use with untreated aluminium conductors, or with screw-type terminals of aluminium material for use with copper or aluminium conductors. This document does not cover the use of aluminium conductors or aluminium terminals for DC applications. Flexible aluminium conductors are not covered by this document.

NOTE 1 Flexible aluminium conductors are under consideration.

This document cannot be used alone but it is intended to be applied together with the applicable product standard. In this document, copper-clad and nickel-clad aluminium conductors are considered as aluminium conductors.

NOTE 2 In AT, AU and DE, the use of aluminium screw-type terminals for use with copper conductors is not allowed.

• — In AT and DE, terminals for aluminium conductors only are not allowed;
• — In ES, the use of aluminium conductors is not allowed for final circuits in household and similar installations e.g. offices, shops;
• — In DK, the minimum cross-sectional area for aluminium conductors is 16 mm2.