The additional kit is used together with the 1 kV joint kit SJK for jointing of belted paper insulated, lead sheathed, steel tape armoured 4 core cables. The kit is suitable for transition from belted paper insulated 4 core cable with lead sheath. The kit includes three heat shrink tubes for protection of the paper insulation, a heat shrink breakout and a braid of tinned copper wires for jointing the lead sheaths and armours.