Electronics Forum / Electrical Engineering / April 2005

ELECTRICITY
Electrical engineers design the circuitry and equipment that distribute
power throughout a building, a task that, like the job of the
production crew for a play, is behind the scenes and not something on

Apologies if this question is not on topic for this group...
Is there such a thing as a converter from a light bulb socket to mains
power? Something that could be used in a place where a power outlet is
not available, but a light bulb socket is?

NEC Table 8 DC Resistance at 75°C, Note 2: R2 = R1[1+k(T2-75)] where k
=0.00323 for copper and T2 = Actual Conductor Temp.
How is T2 arrived at given Actual Ambient Temperature and Actual Operating
Current?

How can a 240 volt hot water heater run with 2 hot wires and no neutral?
Where's the return path??

I have a general question, which might sound ridiculous, but I just want to
make sure about something.
I understand that when you wire a light fixture there are two wires, black
(hot) white (neutral).

If i have a set of contacts which are rated at 60 fla @ 240 v. AC
power...what would be the equivalent rating in '12 VDC fla ' ??
And, is there a mathematical formula to determine this ?
Thanks. Ill check back for answers.

References: <3aoq88F6eb1rlU1@individual.net>
<jO2dnQkq-O2Jq9rfRVn-tw@golden.net>
<FlN1e.80165$KI2.9072@clgrps12>
<ia1g41hghum2hfgd1teg0cl25q3hth0i75@4ax.com>

Can any body (in Easy Terms) explain the difference between a synchronous
and an asynchronous motor.
Regards
John