Iam doing an english technical report and have a question to ask to
help finish the report. I was wondering what the electrical power
would be on the electrical lines in a residential area feeding the
houses before it goes to the transformers for the houses, and what the
power would be to a industrial building. I know that the power to an
industrial would vary from plant to plant depending on what they do,
but if I can get an idea it would help. Thanks
You are going to confuse the OP with semantics.
What the OP want to know is: What is the _voltage_ on typical
distribution circuits in a residential area.
Primary distribution voltages vary from 2400 volts, line to neutral
(4160 volts line to line) up to 34 kV line to line. In the USA, each
phase is stepped down to 240 volts with a 120 volt center tap for
residential loads. In other countries, the service voltages differ (220
V is common in Europe, for example). Commercial service is available at
a variety of voltages. For all but the smallest commercial accounts,
three phase is supplied. Some common values are 120/208 Volt Wye, 240
Volt delta with a 120V tap on one leg, 277/480 Volt Wye.
Some large industrial loads are supplied with the utilities primary
Paul Hovnanian firstname.lastname@example.org
Why not educate, rather than confuse? He'll never get it correct if
you confuse him more. It's not like he made an ass out of himself
and deserved a slap.
Have you never been in the situation where you didn't know enough to
ask an intelligent question? How do you bootstrap yourself out of
that situation, or do you just sit there dumb because you don't want
to look stupid?
You snipped the "english" in front of "technical report". It
appeared to me he was writing a report for an English class and was
merely looking for information. Instead, he got slammed by the big
bad, macho, engineers. You don't have to be a prick, just because
you know something others don't.
and, as an engineer, you shouldn't be sloppy in your use of words or
measurements. Otherwise you'll have something worse than a Mars' probe
being destroyed on landing or a little problem at 3 Mile Island.
*You* don't have to be sloppy. *You* don't have to slam "outsiders"
who are. *You* can correct them nicely and teach them the correct
terminology, while *you* answer their questions. If that's too much
work, *you* could STFU and let others answer.
But, I think I understand you now. Because we're engineers, the
union doesn't allow us teach our "secret handshakes" to others.
Instead we *must* slap them upside the head. Got it. I musta been
out sick the day they covered that part of the union rules.
Aren't you ashamed for trying to help and guide someone rather than cast
them out as idiots?
There are quite a few "sick" engineers, including those who teach
engineering when the "secret handshakes" were handed out. You, Daestrom,
Paul H. etc. I hope I can be included in your company.
Don Kelly email@example.com
remove the X to answer
I visited a newsgroup a year or two ago about HVAC systems. I've dabbled in
that over the years and thought I'd have a look see. Now there was a group
that not only had secret handshakes, they had special door knocks and
special authentication via emoticons. If you weren't able to rattle off
fifteen buzzwords and cite a few certifications you were promptly drummed
out of the club. Okay, maybe that's an exageration, but they were a pretty
tight little clique and had no interest in helping a novice or someone 'not
in the trade'.
Oh well, maybe they're like good scotch and get mellower with age :-)
Other than working in hot or dirty places, it's one of the simplest
jobs in a home. I wrote software for a HVAC company, years ago, to
calculate the heat load, select the proper equipment, and print out the
bid. They were yammering about how hard the work was, and how NO home
owner was smart enough to do their own work. What a pathetic bunch of
I was working at a TV station in Orlando in 1987. They had a 5 ton
AC unit to cool the equipment racks. It barely kicked on, yet the
equipment was running hot. They had been to the station a half dozen
times, once with a factory "Engineer" and they couldn't figure out what
was wrong. I took one look and spotted the problem. All the vents were
in the ceiling of the tiny area. The face of the racks were in the
control room, and there was a row of sliding doors in the hallway behind
the racks to access the wiring. The air above the racks was 60 degrees
F. The air inside the racks was over 100 degrees F. All the cabling
and the layout of the racks and equipment was causing severe
stratification. I asked them to remove one of the supply vents and
attach a piece of flexible ducting, and drop the other end to the
floor. They all jumped on me, bragging about how many years experience
they had, combined, and that I couldn't POSSIBLY know what i was talking
about. I shrugged and said, "Then prove me wrong, if you can." They
got pissed, but one of them went to his truck for his tools and some
duct. He hooked it up and dropped it to the floor. i set their
thermometer on the top of a piece of equipment, and closed the doors.
15 minutes later, the equipment cabinets were cold to the touch, and
they were all red faced. They had screwed around for two years with it,
while the station spent thousands of dollars per quarter on failed
components and kept the engineers busy, trying to keep the studios up
Service to my country? Been there, Done that, and I've got my DD214 to
Me? This power stuff is Greek to me. I avoided it like the plague
in college (I do microprocessor and logic design). I find it
interesting now, so read what you folks here have to say. I've been
peeking at your hands.
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