My Ideal SureTest Circuit Analyzer shows a voltage drop of over 1.3%
right at the circuit breaker. This means that voltage drops for
circuits which should be less than 5% appear over 5% on the meter.
This doesn't bother me but it appears to bother other people expecting
the meter to read < 5%. What causes this? Where/how is the voltage
drop measured? Is there a solution?
Thank you for your time and energy,
Voltage drop at the breaker compaired with what?
I have never used a Ideal SureTest and probably never will ( $200.00
googled ) My VOM's cost double that. Not that it is a bad piece of
equipment but the stuff I use cost 10's of thousands of dollars.
from a web page
a.. True RMS
True RMS WHAT?
a.. Measures voltage drop under 12, 15 and 20-amp load
Which one did you use?
a.. Line voltage
a.. Peak voltage
a.. Ground-neutral voltage
a.. Ground impedance
I am not even going to deal with these functions. With out knowing a lot
about the electrical system your measuring high/unacceptable numbers on any
of these items is very possible.
When I do testing one of the first things I am asked to provide is a
certification/calibration testing of the instrument with in a year of the
test I am doing. All of my equipment is tested annually and there is a
sticker from the testing agency on each piece of equipment. This is an
expense and a pain in the ass. But my customers know that my equipment is up
to specs and what I measure is a true and accurate reflection of the
In all reality the voltage drop is not something that is enforceable unless
you have specs and an owner that has paid for it. Reporting something that
in all likely hood will not be changed is not productive. If someone
challenges your findings. How are you going to defend your position? Your
certainly not going to get anyone knowledgeable to listen to you with a $200
Meter not accurate enough, or out of calibration
Operator does not use it correctly
I understand where you're coming from, being an EE myself. But I don't
think the guy needs some lab certified result. After all, he doesn't have a
test protocol even.
I just think he wants to know some basics.
"> > challenges your findings. How are you going to defend your position?
I agree completely. The basics do not include voltage drop readings in my
opinion. That is advanced testing in my mind.
Even the basics hold liablilies now days. If your going to use a meter and
"state some thing is out of spec/wrong" then the meter better damned well be
certified accurate. Because the your next visit might be in court.
If you can get money for pouring hot coffee in your lap making statements
about an electrical system could end up in court in the worse case scenario.
Been there - done that made a really bad week for me and the customer even
though we prevailed.
I'm sure lucky I have never had to give a disposition or go to court. I was
sure that I would after I did my company's Y2K testing and thought that we
may have overlooked something. I left shortly before 2000 and didn't hear
anything since so I guess it's ok :)
I did get into an argument on the phone with some lawyer type about how we
tested for it. I didn't budge and he was pretty pissed.
AHHHH the Y2K debockel... Remember that well. I had been working for a
university doing automation. I had left and got a call from the old boss.
Were the PLC's that I used y2k compatible?
I answered yes and no. No they did not have a register for the year that was
4 digits. Yes because I never used the year register. So as long as Monday
was not followed Wednesday everything would be fine. Took several lunches
( he paid ) and several phone calls before they finally fingered it out.
They had 20 people in the lunch room at midnight ( unpaid ). I was home
enjoying myself. I knew when London hit midnight and there were no phone
calls from my friends that were there, everything was going to be calm and
I'm curious why you even talked to the lawyer. I have always thought it
unwise to respond to any question posed by an attorney unless I was
subpoenaed. I figure that they know what they want and I don't and that
they know what is dangerous to say and I don't. Every time one has
called me I have been grateful for the protection of being able to say
"You will have to contact the office of the county solicitor because I
cannot speak to anyone about a matter arising out of my service as a
firefighter without their express permission." So far no lawyer has
ever wanted to question me about a non line of duty matter. If I ever
do get into a legal hassle over my bread work as an electrician I'll
refer them to my insurance carrier's attorneys. I just think that it is
best to let lawyers talk to lawyers.
"This alternating current stuff is just a fad. It is much too dangerous
On 17 Aug 2005 07:19:22 -0700, " email@example.com"
Suretest establishes a voltage level, then imposes a very short
duration 12a load and takes a snapshot of the voltage under that load.
It is an indication, not a real test.
This could really be some high frequency impedance in the breaker that
is tricking the suretest but would have no effect on a resistive
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