The screening effect produced by the metal screen of a cable mainly depends on: the frequency of the induced e.m.f. The limitation of this e.m.f. mains frequency (16 2/3 Hz, 50 Hz,
60 Hz) is therefore a determining factor in the choice of a cable from t
ITU-T K.14-1988 history
1988ITU-T K.14-1988 PROVISION OF A METALLIC SCREEN IN PLASTIC-SHEATHED CABLES