Image:Light fitting plug with toaster.jpg

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Image:Light fitting plug with toaster.jpg

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[edit] Copyright info

See Talk:Mains power plug for copyright information.

This image has been (or is hereby) released into the public domain by its creator, Chameleon. This applies worldwide.

In case this is not legally possible,

the creator grants anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.
Subject to disclaimers.

[edit] Extract from Mains power plug:

“When electricity was first introduced into the domestic environment, it was primarily for lighting. However, as it became a viable alternative to other means of heating and also the development of labour-saving appliances, a means of connection to the supply other than via a light socket was required. In the 1920s, the two-prong plug made its appearance.

“At that time, some electricity companies operated a split-tariff system where the cost of electricity for lighting was lower than that for other purposes, which led to low-wattage appliances (e.g. vacuum cleaners, hair driers, etc.) being connected to the light fitting. The picture below shows a 1909 electric toaster with a lightbulb socket plug. As the need for safer installations grew, earthed three-pin outlets were developed.”