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FIRE SERVICE AND GENERAL FIRE SAFETY TOPICS => Fire Investigation => Topic started by: firstforensic on December 23, 2010, 11:30:42 AM
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Im hoping that someone might be able to help me identify an electrical plug removed from the scene of a fatal fire.
Its a black plastic, double insulated plug with markings on its face.
Markings appear to include: O C E ...
input 100-240 V
output 4.0 V (or could be 4.9 V or even W)
If you could have a look at your phone chargers etc Id be grateful.
Merry christmas to all.
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Hi
Sounds like you are right and it is a transformer.
Any Photos?
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There is - but Im flummoxed as to how you add it in. I get as far as the "insert image" icon and then it all becomes a techno mist!
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To me it sounds like what I would call an adapter power supply i.e a power supply that it housed in an enclosure that plugs straight into a mains socket and provides a low voltage output to power some equipment.
The above is not strictly a 'transformer' as such. It probably doesn't even include a transformer. I guess this because the input is described as 100-240V (very wide input) and products with transformers normally have a fixed single input voltage (probably with a bit of tolerance i.e. +/- 6%)
I would guess it uses what is known as 'Switch Mode' circuitry to reduce the AC voltage and convert it to DC.
An ouput voltage of 4 or 4.6V is a bit intriguing and I would have to guess it has been produced to power a specific bit of equipment. Also there are not many consumer products that have a normal operating voltage as low as 4V (but anything is possible).
As a wild guess, I'd be thinking of something like a power supply to recharge the batteries in an electric razor.
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From a google search it appears that chargers for Li-Ion batteries commonly give an outut such as this.