Bus Bar System for Rising Mains

Bus Bar System for Rising Mains Points : Bus Bar System for Rising Mains Totally-enclosed using-main bus bar systems consist of bar or lightly-insulated copper or aluminum bus bars in a metal trunking. The bus-bar may be of circular or rectangular cross section. This system is extensively used in multi-story buildings. It is usually consists of bus bars which have die, capacities of I 00A to 500A with two, three or four conductors. Tap-off boxes with fuse links or fuse switches can also provided for distribution to each floor, where distribution boards are fitted. On most bus-bar systems, a self adjusting suspension unit is fitted at the top of the run. This not only supports the weight of the individual bars, but allows for the maximum expansion and contraction likely to occur in the bus bars under normal conditions and takes case of all the resultant stresses from the insulating supports. It is recommended that always use the correct size of bus bars and the maximum temperatures should not exceed 90°c. If we use rubber or-P.V.C cables and when we connected to these cables with bus bars then always removed the insulation and sheath for a distance of 150mm from the connection and replaced by suitable heat resisting insulation.