Material of Copper Terminals Cable Terminals High conductivity seamless copper tube to BS 2874 -C 101ASTM B 152-C11000. Features of Copper Terminals We are the first company in India to introduce bell entry copper terminals to facilitate easy cable entry. Provided with inspection window, thus ensuring full conductor insertion. Copper Terminals Finish Uniform electro-Tin plating for operating temperatures up to 150 °C. For operating temperatures above 150 °C & up to 350 °C Electrolytic Nickel plating is suggested.. Sizes of Copper Terminals From 1.5 mm² to 240 mm² with different stud hole sizes as required.