This low-voltage split-core current transformer is part of PowerLogic HDPM6000 (High Density Power Meter). It is prefered for new installation were cables aren't fixed on both end yet. The transformer is rated for a 400A circuit and a nominal voltage output of 0.25VAC at rated current. The split-core opening is a window of 31.75mm x 31.75mm. The lead consist of black and white twisted pair, 18AWG, length of 5inches. Come with connector for use with HDPM6000S 21-circuit strip module only. Follow National Electrical Code (NEC) requirement for UL2808, retrofit energy monitoring equipment. The transformer dimensions are 83.81mm in width, 78.74mm in height, 31.04mm in depth for a net weight of 0.484kg. This element is certified UL2808 and compliant to CE. Please refer to label for correct current flow orientation.