On Tue, 04 Oct 2011 12:02:45 -0400, "Steve W."
wrote:

Lloyd E. Sponenburgh wrote:
Benny Fishhole fired this volley in
:

So watts the color code for a 10 ohm resistor rated at 4840 Watts ?

Nichrome grey.

G

LLoyd

Depends on the voltage and frequency as well.

Anyone been reading about how some folks are trying to get things
switched back to DC transmission? Saw that China is doing that at some
new power plant and some "green" outfit says it's the best way to
conserve energy (by eliminating the AC/DC conversions in the power
system). I want to see the conductors they use to shuttle the average
power load from even a small city!!!!

Big Wire up there because the electrons are actually making the trip
instead of just doing "the wave" back and forth in place as AC, but
not all that big - they run the two-wire Pacific DC Intertie at
+500,000V and -500,000V to ground. 1MV between them.

The only real advantage to HVDC transmission (and why they use it at
all, because it is not as efficient) is that the two power grids at
each end don't have to be in frequency sync with each other.

The grid at our end (LA DWP) is ultimately synched to Hoover Dam,
and the other end is probably synched to the Grand Coulee Dam
generators.

One end can be slipping 1/8 Hz because they had some surge loads,
and the other end doesn't have to, and they can still stay linked up.
If they were hard-linked by AC frequency, the tie would have to pop
offline, or drag the other end down to the same speed.

-- Bruce --