Electronics Forum / Electrical Engineering / May 2004

Hi all. I have a problem with a dimmer light switch plate. when its touched
there ia "buzzing" sound and a faint tingle.
uk 240vac supply tn-c-s (pme) earth system
I have measured from the metal face plate to earth and i get a reading of

Could someone point me in the direction of information regarding centre
tapped transformers.  I need more details to try and understand why they are
used in the uk on mains voltage for controlling reduced voltage equipment.
I understand primary windings and that the purpose of the ...

I need to replace a miniature bulb that illuminates my doorbell nameplate.
The original is an 18 volt, 3 watt bulb, but I can't find any similar to it
(it's a "festoon" style 8x31mm bulb). The closest I can find of this size
and type is either a 12v3w bulb or a 24v3w bulb. Would ...

My house has 200 amp service.  There are no more empty spots for
breakers on the main panel.  I would like to install two 100-amp
sub-panels:  one in the garage and one at the other end of the
basement.

Majority of the electrical items like bulbs,speakers,batteries are
specified in terms of the working voltage or power(watts).
My question is why the current specification is not used or mentioned
?

Fired up the ac and the compressor or the fan didn't come on.
The relay is engaging and the cap has charged.
I have 120v to ground on two of the cap terminals and 10v on the third one.
I

I wish to measure the power usage for a 20 AMP electrical appliance over a
period of 1 month.
What is the easiest and cheapest way of doing this.
Thanks.

Here's a question I've had for a long time.  I've read of people who
generate their own electrical power with various means and sell the excess
to the utility company.  Somehow they are pumping their excess power into
the utility grid.  How is this done?  How can a small generator ...

What a waste.
In XP you can turn on a screen saver that you need a password to bring
windows back on line..
I wanted to use this to keep my kid from using programs that change my

Hi,  I have a feeling this has been posted before, but it doesn't show in my
current postings, as don't the FAQs. Anyway, here goes:
Can anyone give me an idea on the stability to be expected in determining
the power input to a 3 phase induction motor from a current measurement of

Does anyone have any detailed or first-hand info about the power outtage at
the Bellagio Hotel? Where, exactly, was the damage and what caused it? Was
it arcing or tracking inside of a high-voltage transformer? What was the
voltage, 4160? 12KV? If you have any details, please post ...

My father put up a pole building last fall and is now running electric lines
to it from the house. (150ft. away)  He went out and bought the heavy cable
to do the job. (heavy enough for a welder)  But he got three conductor
wire instead of four.  (red,white,black,ground)  Am I ...

Hi, what codes to I have to worry about if I'm putting a 220v 30 amp
receptacle in my carport? I know it has to have a cover but what else?
Thanks
Michael

How much does a Master of Science in Electrical Engineering can enhance a
professional career compared to a Bachelor and is it worth to get into debt
to pursue the degree? I am not interested a priori to become a reasercher or
to follow up with a PhD. Also, how much does the name of ...

I ran across an interesting claim from a manufacturer of rotary phase
converters.  He says that you cannot use an ordinary three phase motor
to build a phase converter and get true 120 degree phase timing.  You
have to use a "specially modified" motor, or the phase angles will be ...