Switches & switchgear

Protective devices are chosen by circuit, not by the size of the box. For MCBs, state the current rating, number of poles, tripping curve and breaking capacity, and check conformity to IS/IEC 60898-1, current edition. Earth leakage protection needs the sensitivity and pole count, isolators the rating and poles, and modular switches the module size and plate finish. Selection should be confirmed by a qualified electrician and fitting done by licensed personnel.