A joint assembly for a busduct comprising a stack of electrically insulatingseparatorplates arranged in mutually adjacent pairs, each pair of separator plateshaving atleast one electrically conductive connector plate located therebetween, eachpair ofseparator plates defining a respective busbar receiving gap therebetween forreceiving respective busbar ends of adjacent busduct sections to be in contactwiththe at least one connector plate therebetween such that said connector plateprovides electrical continuity between respective busbars, upper and lowercoverplates being located on either side of the stack of separator plates, theseparatorplates and connector plates having mutually aligned apertures formed therein,afastener extending between said cover plates and through said mutually alignedapertures in order to clamp the separator plates and connector plates betweenthecover plates, a side cover being provided on at least one side of the stack ofseparator plates extending perpendicular to the separator plates, said sidecoverhaving at least one heat exchange rib extending from an inner face of the sidecoverto extend into the stack of separator plates, wherein said at least one heatexchange rib extends between adjacent pairs of separator plates, on anoppositeside of the separator plates from the associated busbar receiving gap.
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