wrote in message
...
On Tuesday, July 22, 2014 6:47:48 PM UTC-4, amdx wrote:
On 7/22/2014 2:45 PM, wrote:
On Tuesday, July 22, 2014 3:43:41 PM UTC-4,
wrote:
On Tuesday, July 22, 2014 3:22:39 PM UTC-4, amdx wrote:
On 7/22/2014 2:06 PM, wrote:
On Tuesday, July 22, 2014 12:28:45 PM UTC-4, amdx wrote:
On 7/20/2014 11:33 AM, wrote:
On Saturday, July 19, 2014 5:50:58 PM UTC-4, John G wrote:
explained on 20/07/2014 :

Your unwillingness to even mention anything about the NEC shows me
you are just pulling mine.

In any completed Kilowatt Hour service supply, the higher the
voltage, yes, the lower the current.

I don't need your opinions on ohms law, BTW)


For a given load horsepower, yes a higher voltage results in a lower
current -demand-, but whatever its voltage the supply transformer can
still deliver enough current to cause a very destructive
vaporized-metal explosion if you short the lines.
http://www.ci.longmont.co.us/lpc/con...ult_charts.htm
Even the pole transformer feeding your house can supply over 5,000
Amps if shorted.

I needed to know the short-circuit current to specify a fuse or
circuit breaker with an appropriate interrupting rating.
http://ecmweb.com/content/understand...eaker-markings
"If the breaker doesn't have a suitable interrupting rating for the
available fault current, it could explode while attempting to clear a
fault,..."

The UL tests to confirm breaker interrupting rating are spectacular
fountains of fire.

Fuses have voltage as well as current ratings based on the internal
arc they can extinguish.

-jsw,
once tasked to ensure that custom electrical equipment shipped
overseas met the appropriate CSA, Ontario Hydro, NEMKO/SEMKO/DEMKO,
TUV etc safety requirements. Meeting NEC and UL requirements doesn't
guarantee compliance elsewhere, for example Norway wanted a list of
all cadmium- and nickel-plated hardware. Before RoHS they couldn't
exclude them, but they could make using them annoying.