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How safe are 12 volt electric blankets ?

broadgage
Modern mains voltage electric blankets have a reasonable safety record if not misused.

But what about the 12 volt ones ? At such a low voltage there is virtualy no risk of a dangerous electric shock, but what about fire risk ? Are there any product safety standards, and are these enforced.


Are the heating elements of the self regulating PTC type, or just a simple length of resistance wire. Is there any requirement for the covering to be fire retardent ?


Slightly concerned to hear that friends are useing these regularly on childrens beds. (off grid home, no mains electricity) They are used in conjunction with wool blankets (naturaly fire retardent) and cotton sheets (moderatly flammable)

The running current is about 4 to 4.5 amps and the supply is from a 12 volt, 16 amp small power circuit with a 5 amp fuse in the plug.
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    ebee:

    I know people of my generation noticed our parents etc had a common liking for electric blankets - stems, I think, from the days that it was common to have badly fitting sash windows and open coal fireplaces. Ventilation was king but it could be bloody cold in winter. No wonder electric blankets were so  popular.


    They were certainly not a luxury in my grandparents' unheated bedrooms, but they were put on for a period before bed time and turned off on getting in.


    With sufficient lagging, no heating is required.


Reply
  • 0
    ebee:

    I know people of my generation noticed our parents etc had a common liking for electric blankets - stems, I think, from the days that it was common to have badly fitting sash windows and open coal fireplaces. Ventilation was king but it could be bloody cold in winter. No wonder electric blankets were so  popular.


    They were certainly not a luxury in my grandparents' unheated bedrooms, but they were put on for a period before bed time and turned off on getting in.


    With sufficient lagging, no heating is required.


Children
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