Electronics Forum / Electrical Engineering / April 2005

Client has problems with normally open bypass breaker that tripped
free when closed.  There was no fault or overload on the system, and
the same source was on both sides of the breaker when closed.  Breaker
is electrically-operated, drawout-mounted, and is less than 1 year

How can one explain the presence of too much noise in the output of a high
frequency PCB output? How can I reduce the noise?
thanks

hello..
I'm looking for Electrical Inspectors from USA.
I need some info about documentation.
Regards,

Have been trying to get some smoke detectors interconnected, and
during the trouble shooting of the problem, I measured (with an analog
voltmeter) the voltage between the white neutral, and the bare copper ground
wire in the

I'm lookin for electricians who make safety measurements of electrical
instalation in USA.
Bratt.

please ignore

Good day..
I am tring to install power to my new barn and figured I could tap
off of my existing well panel. The question I have is this, If i want
to run a straight single phase outlet to the barn for lighting and I

Is there a difference between 16ga automotive wire and 16ga speaker
wire?
I want to put lights on my homebuilt trailer and I have a 1000 ft of
16ga speaker wire taking up shelf space.

I have a question about J-K flip flops.
First if all, are ALL J-K flip flops Master-Slave or are there other types?
My book has a clock pulse and the J-K is level triggered. On the positive
clock pulse K has a 0 and the J will have a 1, then a 0 and it states that

Saw the following designation on a furnace blower replacement relay,
preumably for the current capability of the contacts:  "8 FLA"
Never ran into this before.
Assuming the A part means amps, which would be about right for the relay and

Can anyone tell what is the error of 5P10 protection current
transformer at low load?
For the metering transformers (i.e. class 1) to be inside the error
limits I need to have the load between 25% and 100% of the nominal

I have had a number of small domestic light controllers fail.
In each case the failure occurred concurrently with the
"normal" failure of the lamp.
The very high current that typically can flow when a lamp

Wondering if stress cones are required/good practice on terminations of 4160
V cables??
I seem to recall that they are standard on 12KV cables.
Best to All

Had an interesting problem today which was resolved when we discovered three
control fuses all with a resistance of aprox 14 ohms. I've never seen this
before and certainly not with three of them. Is this particularly unusual
and why 14 ohms? They were 50mA 20mm fuses

Ok, my friend is considering buying a house in Northern California, and
it's a little older.  The outlets are not grounded.  It's only 2 prong.
 It DOES have use circuit breakers, and NOT fuses though.
I know that simply replacing the outlets with grounded ones, while