Electronics Forum / Electrical Engineering / February 2006

I work for a small company that has developped a medical device. We are
presently looking into the medical device's certification.
We/I know little about standard certification.
Upon looking at the various standards which the medical device

Howdy: I got a small problem with replacing a switch on a fluorescent
desk lamp. It's a swing-arm with a circular bulb. The old switch has
two black wires coming out of one side and a white wire on the other
side. There is a terminal in the middle of the back that the hot line

My grandson bought one of those cheap 110V. rotating 'color-spot' balls.
After I hung it from the ceiling for him, I noticed I could reverse
direction of the rotation by stopping it with my hand and nudging it the
other way. That seems to imply I could do the same thing with a ...

Hey everyone,
I hesitate to even post this message, but after banging my head against
the wall for 5 years, I guess it's not going to hurt.
In 2001, I graduated from the University of Toledo with a BS in

I recently visited a friend while on vacation in the U.S. He had a
computer that was interferring with an old VCR that he had. This VCR
was quote old so I suspect the problem might have been partly with the
VCR.

Appreciate if anyone can help me. I am looking for information on colour
code used in south Korea 380V 3 phase power line. I am used to the BS
standard that is red, yellow and blue phase with neutral in black. But I am
not sure on Korea wire colour code.

my father recently purchased a used piece of equipment.  After plugging
it in one of the relays stuck.  A repairman said it was because he had
the wrong form of 3 phase power.  I'm a new to this but from the best I
can understand, I think he has 3 phase delta and the machine ...

Is it an accepted practice to have a sub-panel feeding off of a another
sub-panel?  My sub-panel is full and I need room for expansion.
Proposed setup:
  -----------       -----------     -------------

Anyone know of a simple formula to calculate what the electic usage of an
domestic appliance.  Our cooker is electric and if it is set to 180c for
example how do you calculate how much electricity it uses say for 20min.
Pat

My girlfriend is applying for medical residency in several "outlying
cities" across Canada and her city ranking-order will be somewhat
influenced by my ability to find employment in these cities.
If you have a sense of ENGINEERING employment availability across

My girlfriend is applying for medical residency in several "outlying
cities" across Canada and her city ranking-order will be somewhat
influenced by my ability to find employment in these cities.
If you have a sense of ENGINEERING employment availability across

When I originally put in my panel (with the help of my brother -whom I can't
ask now because he id deceased);
we started to put the grounds and neutrals under separate screws on the
grounding bars. Then the inspector

I would like to know the difference between a 200amp at 240 volts on a 1
phase service and that on a 3 phase please. Considering the power factor
rating of 80%. Is it more power? If it is how much more.

I recently visited a friend while on vacation in the U.S. He had a
computer that was interferring with an old VCR that he had. This VCR
was quote old so I suspect the problem might have been partly with the
VCR.

what happend in achrafieh has nothing to do with lebanese muslims!
we´ve been living together for a long time and if we would do such thing we
would then have done it during the chaotic 2005.
but we believe in diversity and what MP Seniora and MP Hariri said is an