采用IEC60947-7-1，Ed.3.0（2009），其中规定了主要用于工业或类似用途的带螺纹或无螺纹夹紧装置的接线板的要求，并将其固定在支架上，以在铜导体之间提供电气和机械连接。本规范适用于连接圆形铜导线的接线板，无论是否经过特殊处理，其横截面在0.2mm2至300mm2（AWG 24/600kcmil）之间，用于额定电压不超过1000V交流至1000Hz或1500V直流的电路。 C

Adopts IEC60947-7-1, Ed. 3.0 (2009) which 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 between copper conductors. It applies to terminal blocks intended to connect round copper conductors, with or without special preparation, having a cross-section between 0.2mm2 and 300mm2 (AWG 24/600kcmil), intended to be used in circuits of a rated voltage not exceeding 1,000V a.c. up to 1,000Hz or 1,500V d.c.