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Which is safer - DC 12 volts or 24 volts?
Do 12 volt LED strip light systems also have lower shock risk than 24 volt? I have heard that "it's not voltage that kills, it's current" - in which case the 12 volt LED strips would appear more dangerous given that it has twice the amperage.
Generally, we believe that "shock risk" increases as the voltage increases. At a very basic level, this suggests that 12 volt LED systems would have the lowest possibility of causing an electric shock, while 24 volt would be slightly higher but still relatively low, and 120 volt line voltage would be much higher in terms of the possibility of causing an electric shock.
Shock risk, however, is not the same as the potential to cause bodily harm or injury. The zap from static electricity that you feel on a dry winter day, for example, has a very high voltage of tens of thousands of volts, but does not cause any harm due to the inherently low amount of energy (as you mention, it lacks the "current which kills").
The primary reason lower voltage systems have a lower shock risk, is simply due to the fact that low voltage systems generally lack the voltage potential to overcome the high electrical resistance in our human skin. Therefore, a 12 volt system, even one with a higher amperage rating, is seen as generally lower risk because the 12 volts is usually insufficient to penetrate skin and other objects.
Low voltage systems do have a lower risk, but that is not to say they are risk-free. Please use caution and consult with an electrician when installing any LED systems you are not familiar with.
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