CHENNAI: The Tamil Nadu Electricity Regulatory Commission (TNERC) has made it mandatory to install ‘Residual Current Device’ on new single-phase and three-phase connections to houses, shops, industries, hospitals, parks, street lights, temples, schools, and colleges. The device helps prevent electrical accidents and loss of lives, according to the commission. The TNERC has notified new provisions in this regard in the Tamil Nadu Electricity Distribution Code.