BELATED CABLE:-        These cable are used for voltage rating upto 11 KV but in extraordinary cases Their use may be extended upto 22 KV . ° The Belted type construction is suitable only for low and medium voltage. ° the electrostatic stress developed in the cable for these voltage are more or less radial ie across the insulation. °° for high voltage (beyond 22 KV) the tangential stresses also become important. SCREENED CABLE :-        Used upto 33 KV but extended upto 66 KV. It is of two type       - H type       - SL type H TYPE :-                     The insulation on each core is covered with a metallic screen which usually consists of a perforated aluminium foil . - It has no insulating belt - all the four screen (3 core screen and one conducting belt) and the lead sheath are at earth potential . Advantage-  ° the possibility of air pockets...