Joining pipe-type cable to oil-filled cable

FULL REALIZATION of the economic advantage associated with the use of pipe-type cable has sometimes been prevented by the lack of a joint of suitable and proved design for connecting pipe-type cable to existing low-pressure oil-filled cable lines. This problem arose anew in connection with the design of supply lines to Lombard Substation, Philadelphia (Pa.) Electric Company´s newest 66/13.2-kv substation. Here the advantages of using pipe-type cable in conjunction with an existing oil-filled cable were sufficient to justify considerable effort to develop a practical method for connecting these cables. Co-ordination with high-voltage cable and accessory manufacturers resulted in the production of satisfactory stop joints, six of which are in service on the new project.