The IEC 61439 series of standards sets out the regulations for power distribution boards as well as assemblies for power distribution in public networks, construction sites, and for prefabricated busbar trunking and cabling systems. It defines the minimum distances between live parts and between live parts and earthed metal parts. These clearances help prevent arcing, short circuits, and. From time to time we are asked what bus spacings are required by ANSI standards for switchgear. Those who ask are frequently surprised by the answer: None. Dielectric tests, power frequency withstand for all voltages and impulse. Guide to Low Voltage Busbar Trunking Systems Verified to BS EN 61439-6 Guide to Low Voltage Busbar Trunking Systems Verified to BS EN 61439-6 November 2014 Guide to Low Voltage Busbar Trunking Systems Verified to BS EN 61439-6 Companies involved in the preparation of this Guide Acknowledgements. Eng-Tips is the largest forum for Engineering Professionals on the Internet. The main objectives of the standard cover the safety of persons. The table, in addition to giving specifications regarding the maximum thickness of the busbar, the maximum current and the maximum nominal voltage, distinguishes between busbars mounted in a “Face to Face” or “Edge to Edge” arrangement.
