IEC TS 60947-7-5:20 21规定了主要用于工业或类似用途并固定在支架上以提供电气和机械连接的带有螺钉型或无螺钉型夹紧单元的端子板的要求。本文件可用于铝导体或铝与铜导体之间连接的端子板。它适用于用于连接圆形导体的接线端子，无论是否经过特殊准备，横截面在2.5 mm2和300 mm2之间（AWG 12到600 kcmil），用于额定电压不超过1 000 V AC（高达1 000 Hz）或1 500 V DC的电路。

IEC TS 60947-7-5:2021 specifies requirements for terminal blocks with screw-type or screwless-type clamping units primarily intended for industrial or similar use and to be fixed to a support to provide electrical and mechanical connection. This document can be used for terminal blocks for connection between aluminium conductors or aluminium to copper conductors. It applies to terminal blocks intended to connect round conductors, with or without special preparation, having a cross-section between 2,5 mm² and 300 mm² (AWG 12 to 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.