When Did The UK Start Using 3 Pin Plugs?
When Did The UK Start Using 3 Pin Plugs? The first British standard for domestic three-pin plugs was BS 317 Hand-Shield and Side Entry Pattern Three-Pin Wall Plugs and Sockets (Two Pin and Earth Type) published in 1928. When did 3 prong plugs become standard? In 1969, Underwriters Laboratories mandated three-prong plugs on major appliances