The IEC (International Electrotechnical Commission) and BS 7671 (British Standard for Electrical Installations) both provide essential requirements for electrical installations, including those for fuse boards like garage unit, consumer unit and distribution board. Electrical systems require routine maintenance in order to ensure that they are in continuing accordance with the regulations. Power distribution & circuit protection depend on it. LV intrusive switchboards accept power from the utility & generator & distribute it to building circuits. Both sets of standards offer comprehensive.