... is the basic element of bus bar system, may be mounted with 5mm ... busbar, double-T Universal bus bar frame , , is used for bus bar of 12,15,20,25,3 ... *5/10UL- bus bar frame, is used for busbar of 12, ... 10 Bottom groove , suitable for UL - bus bar framePE/E-bus bar frame, is used for 12,15,20,25 ... ,30*5/10Bus bar frame with connection terminal , ...