A link box (10) for connecting electricity cables is disclosed. The link box comprises an enclosure and a link assembly (40,140) mounted within the enclosure. The link assembly (40,140) comprises a plurality of terminal pairs (43,143) to which ends of the cables are, in use, connected, and a plurality of upstanding spigot pairs (45,145) between which mechanical linkages (70) may, in use, be applied to connect the cables. Furthermore, the link box (10) includes a barrier unit (50) that is engageable with the link assembly (40,140). The barrier unit (50) is configured to surround the plurality of upstanding spigot pairs (45,145) and any mechanical linkages (70) that are, in use, present, and to provide a non-electrically conducting barrier between the spigot pairs (45,145) and mechanical linkages (70).