DIN EN IEC 60947-7-1:2026-03

This part of IEC 60947 specifies requirements for terminal blocks and test disconnect terminal blocks with screw-type or screw-less-type clamping units primarily intended for industrial or similar use and to be fixed to a support to provide electrical and mechanical connection between copper conductors. This part applies to terminal blocks intended to connect round copper conductors, with or without special preparation, having a cross-section between 0,05 mm²/30 AWG and 300 mm²/600 kcmil, intended to be used in circuits of a rated voltage not exceeding 1 000 V AC up to 1 000 Hz or 1 500 V DC. This document is not intended for connecting devices intended for household use in accordance with IEC 60998-1. The standard differs from DIN EN 60947-7-1 (VDE 0611-1):2010-03 as follows: a) scope extension for smaller conductor cross-sections; b) implementation of a contact pressure via insulation material (CoPI) test; c) introduction of new informative Annex E for larger cross-sections; d) reorganisation of all tables merged into two tables for electrical and mechanical values; e) implementation of AWG-sizes conductor types as an equivalent type of metric conductor with examples in Annex C; f) reorganisation of Annex D test disconnect terminal blocks to enhance readability; g) introduction of new informative Annex A for main characteristics of terminal blocks. Typical applications covered by this document include terminal blocks to connect round copper conductors having a cross-section between 0,05 mm²/30 AWG and 300 mm²/600 kcmil for use in low-voltage systems. This document may be used as a guide for: - terminal blocks requiring the fixing of special devices to the conductors, for example quick connect terminations or wrapped connections, etcetera; - terminal blocks with screws for wire attachment; - connections with studs and brackets; - connections with lugs; - terminal blocks providing direct contact to the conductors by means of edges or points penetrating the insulation, for example insulation displacement connections, etcetera; - special types of terminal blocks, for example with diodes or varistors or similar component holders, etcetera. - terminal blocks capable of connecting conductors with cross-sections greater than 300 mm²/600 kcmil, see Annex E.