Tamil Nadu Electricity Regulatory Commission (TNERC) has notified new provisions in the Tamil Nadu Electricity Distribution Code on 5th July 2021. The new provision makes the installation of the Residual Current Device (RCD) compulsory in all electricity service connections to prevent electrical accidents and loss of human lives.
RCD is more commonly referred to as residual current circuit breaker (RCCB). RCD will be mandatory in all installations of both single-phase and three-phase connections of houses, shops, industries, hospitals, parks, street lights, temples, schools, colleges, etc, as well as temporary service connections.
In installations with less than 10KW electrical load, Residual Current Device (RCD) with rated residual operating current not exceeding 30 milliamperes (mA) must be installed. In installations of larger electrical loads exceeding 10KW, like big shops, malls, hospitals, godowns, large-scale industries, RCD with a rated residual operating current of 300 mA must be installed for avoiding fire accidents and protection of property.