48v is indeed considered low voltage, in that a different electrical standard is used in wiring systems over 50v nominal. However, 48v can be lethal. Depends on how much current the circuit can carry. Obviously 2kw of solar panels can produce more current for a given voltage than 20w. The human body when dry can have over 100k ohm of resistancw, but when wet this can be less than 1k ohm.
With DC, there is little to fear from touching one polarity of a circuit at 48v. I can handle terminal nuts bare handed on my 48v bank, if I am careful not to touch any other part of the circuit at the same time. However with wet, salty hands, if I were to complete the circuit across the pos and neg terminals, I have little doubt that I would be quite dead, quite soon.
You can arc weld with 36v.
Yeah this is AC but interesting anyway.
https://www.osha.gov/SLTC/etools/construction/electrical_incidents/eleccurrent.html
And this
http://www.brighthubengineering.com/power-plants/89792-ac-and-dc-shock-comparison/
According to this, no deaths are known to have occurred due to electrical shock from less than 50v except from DC welding equipment.
http://m.ecmweb.com/shock-amp-electrocution/small-contact-voltage-exposures-not-lethal-human
Bottom line... have no exposed wires or connectiins, and keep all electrical equipment dry, and there should be no problwm.
| Reply via web post | • | Reply to sender | • | Reply to group | • | Start a New Topic | • | Messages in this topic (14) |
No comments:
Post a Comment