GFCI's

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The GFCI was marketed in 1962 as a self-contained unit, to be wired in series with a load. The first circuit breaker type was introduced around 1968, and the first receptacle type in 1972. 1968 NEC * GFCI protection for underwater pool lights was required. 1971 NEC * GFCI protection was required for storable pools, for pool receptacles, and for some feeders. It becomes an option for protection of receptacles at construction sites. 1973 * required for outdoor receptacles at dwellings. 1975 NEC * required for receptacles in dwelling bathrooms, and for fountains. 1978 NEC * required for receptacles in dwelling garages; for bathroom and outdoor receptacles in mobile homes and recreational vehicles; for receptacles in recreational vehicle parks, marinas, and boat yards; and for receptacles in health care facilities. 1981 NEC * tub motors and portable signs were included. 1984 NEC * covered replacement receptacles, and also added hotel bathrooms. 1987 NEC * added receptacles in commercial garages, dwelling basements, and boat houses; spray washers, and receptacles serving kitchen counters near sinks. 1990 NEC * added photovoltaic roof arrays, receptacles serving kitchen islands, receptacles in crawlspaces, and receptacles near sinks in mobile homes and recreational vehicles. 1993 NEC * added receptacles in non dwelling bathrooms, on rooftops, in elevator pits, and serving wet bar sinks in dwellings. 1996 NEC * added receptacles in trailers, receptacles serving escalators, electric vehicle chargers, receptacles in sheds, balcony receptacles, and receptacles serving previously exempt kitchen counters.

Thanx to Brian Magilley for providing this information.