An electrical loadcentre bus bar mounting assembly comprising a plurality of juxtaposed synthetic plastics moulded members (10,11), each formed as to interlock with each adjacent member and each formed with plurality of location lugs (15) for engagement with apertures in a support member, in use. A first of the moulded members (10) comprises a single incoming module formed so as to be attachable to either the top oR the bottom end of the assembly, in use. The incoming module (10) may be formed with four upstanding spaced apart barrier members between each adjacent pair of which barrier members is formed a separate channel, each for locating the input end of one of three output bus bars (L1, L2, L3), in use. Fig.1
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