AA Common Bonding Network (CBN) Jumper is the electrical connection between the cabinet/rack bonding bus bar and the common bonding network, which can be below a raised fl oor (also called SRG or Signal Reference Grid) or overhead. Inside every professionally built distribution cabinet, the neatly aligned **busbars—copper bars, conductor bars, or power distribution bars—**form the structural backbone of electrical energy transmission. These conductors carry high current and act as the critical link between transformers. Among them, the small busbar at the top of the high-voltage cabinet, although small in size, plays a crucial role. Basic Definition of the Small Busbar at the Top of the High-Voltage Cabinet The small busbar at the top of the high-voltage cabinet, as the name suggests, is a small busbar device. With NEC requiring all metal parts likely to become energized but not part of a normal conducting circuit to be bonded? Is it proper for me to install a bonding wire jumper from otherwise isolated ground bus bar to sub panel metal cabinet? If so do I size it to largest conductor or over current. The use of busbar systems with their versatile rail-adaptable connection, switching and installation devices is an ideal and cost-effective electrotechnical enhancement of modern distribution boards thanks to their small footprint, modular design and quick assembly contacts. The true value of Rittal's industrial power distribution.
