Operation of low-pressure gas-filled cable

SINCE 1938 low-pressure gas-filled cable has been the source of considerable discussion before meetings of the Institute and other technical associations. Papers presented by Shanklin in 1939¹ and 1942² and an unpublished paper by Del Mar and Gambitta in 1943 discussed the theoretical aspects of a cable utilizing gas as pressure medium and presented extensive laboratory test data on the expected life of this type of cable. From these data it was indicated that if low-pressure gas-filled cable is operated at an average stress of less than 75 volts per mil and at a minimum gas pressure of ten pounds per square inch satisfactory operation may be expected.