On 2014-07-19, John G wrote:
wrote :
On Thursday, July 17, 2014 6:42:43 PM UTC-4, amdx wrote:
On 7/15/2014 1:20 PM, wrote:

Overhead commercial lighting voltage is 277 so its less current and less
dangerous, but what if a contractor is still more picky?

[ ... ]

it is false, that 277 Volts is safer than 120 Volts.

The 277 volt line may only deliver 1 amp to the light, it most certainly

could deliver several hundred amps for a short time and 20, 30 or even

50 amps continuously.

In any event, the power of commercial (even residential) wattage is
dangerous, but with more of it in voltage, its safer.

Please do not post rubbish.
There are some people trying to learn here.

The wattage used has no bearing on the risk of electrocution.
Any voltage above about 50 is considered dangerous and 240 is worse
than 120 and 270 ia worse.
The current will be dependant on the circuit resistance.

And, while the initial resistance will be a function mostly of
the moisture and salinity of the hands contacting the voltage source,
once the initial current starts to flow, the skin breaks down and the
resistance drops rapidly -- and the more the voltage, the more rapidly
the resistance drops. And the current needed for a fatal dosage is well
below the trip current levels of commercial circuit breakers. (I do
have some glass cartridge fuses rated at 1/100 Amp (10 mA) which should
be enough to protect you -- but not enough to allow most equipment to
operate, so that is why I still have those fuses unused. :-)

Please go and learn some basic electricity before you make foolish
statements. :-?

Amen,
DoN.

--
Remove oil spill source from e-mail
Email: | (KV4PH) Voice (all times): (703) 938-4564
(too) near Washington D.C. | http://www.d-and-d.com/dnichols/DoN.html
--- Black Holes are where God is dividing by zero ---