The type CB impregnated-paper cable

R. W. Atkinson (General Cable Corporation, Perth Amboy, N. J.): Rosch shows the results of load-cycle aging tests on two cables, in one of which the conductor is shielded by carbon-black tapes, the other cable being similar except without this shield. His data are in line with those obtained by other laboratories in indicating that the addition of shielding tapes improves cable performance. However, while others give credit for the improvement to the electrical shielding effect of the tapes, Rosch apparently attributes the improvement to the adsorptive effect of the carbon black in the tapes. As will be shown later, Rosch´s own data do not bear out his conclusion.