be affixed to a ceiling structural support member as is common with previous type systems however in the preferred embodiment as shown especially in fig2 a 2 b and 3 a the bus duct system 20 is supported by a plurality of stanchion support poles 50 as shown in the figures the stanchion poles 50 extend vertically from the floor and support the frame rail structure 56 which is attached to the stanchion poles 50 through the use of the support pole cap assembly 52 and through these are attached to either end of the cross bars 40 preferably the stanchion pole pairs are spaced about 48 inches apart so as to insure sufficient support for the weight of the bus duct system 20 the stanchion support poles 50 thus provide an independent system of support not reliant on the physical structure of the building housing the bus duct system 20 in this way the present bus duct system 20 has greater resistance to seismic activity since the bus bar assemblies 22 24 will be more resistant to damage resulting from slippage of the system 20 as shown especially in fig2 a 2 b 3 a and 5 a the stanchion poles 50 include stanchion.