Actually Edison Illuminating Company of America installed the first electric
lights on the UK railway in the 1920s at Fenchurch Street (London) so they used
what they were experienced with ... and because its safer.
The UK railway hasn't changed it since.
From: Ted Eckert
Bolivia has a 50Hz grid, but some parts of the country operate at 110V while
other parts operate at 220V. There is some mixing of the 2 voltages in some
areas. I was in a room in La Paz where one side of the room was 110V and the
other side was 220V, with the same type of receptacles and no
Auto-ranging rules! J
(or else the insurance company!)
-Original Message-
From: emc-p...@ieee.org [mailto:emc-p...@ieee.org] On Behalf Of Aldous,
Scott
Sent: 05 July 2012 16:55
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: RE: Interview Questions
Bolivia has a 50Hz grid, but some parts
@LISTSERV.IEEE.ORG
Date:
07/05/2012 09:02 AM
Subject:
Re: [PSES] Interview Questions
Auto-ranging rules! J
(or else the insurance company!)
-Original Message-
From: emc-p...@ieee.org [mailto:emc-p...@ieee.org] On Behalf Of Aldous,
Scott
Sent: 05 July 2012 16:55
To: EMC-PSTC@LISTSERV.IEEE.ORG
@LISTSERV.IEEE.ORG
Date:
07/05/2012 09:02 AM
Subject:
Re: [PSES] Interview Questions
Auto-ranging rules! :)
(or else the insurance company!)
-Original Message-
From: emc-p...@ieee.org [mailto:emc-p...@ieee.org] On Behalf Of Aldous, Scott
Sent: 05 July
The UK railway signalling system all runs at 110 V AC 50 HZ
Andy
-Original Message-
From: John Woodgate [mailto:j...@jmwa.demon.co.uk]
Sent: 03 July 2012 21:17
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: Interview Questions
In message
Hi Andy,
Is there any particular reasons to have 110 Vac for railway signalling
system in a 230/240 Vac country?
Scott
On 4/7/12 3:10 PM, Andrew McCallum andrew.mccal...@deltarail.com wrote:
The UK railway signalling system all runs at 110 V AC 50 HZ
Andy
-Original Message-
It's safer! :-P :-D
On Wed, Jul 4, 2012 at 12:28 PM, Scott Xe scott...@gmail.com wrote:
Hi Andy,
Is there any particular reasons to have 110 Vac for railway signalling
system in a 230/240 Vac country?
Scott
On 4/7/12 3:10 PM, Andrew McCallum andrew.mccal...@deltarail.com
wrote:
The
I think Ken is on the right track. Railroad signally and portable equipment
both represent areas where there is a higher risk of exposed connections.
Receiving a shock from 110V is unpleasant, but it is less likely to lead to
significant harm than a 240 V shock. I've contacted 110V a number of
To keep people from stealing the bulbs?
Heh.
Wikipedia says 110 or 120 V are used for traction on a couple of lines,
most higher, some MUCH higher. Perhaps I'd have learned more if I'd
gotten the job at Kawasaki's New York railcar facility.
Hello All,
I have recently been tasked with writing a set of questions that job
candidates would need to answer at the same time they apply for a
position requiring knowledge of product safety evaluation, testing
and practices. These questions would serve as an automated pre
screening
In message
CADYqxLATv+VVo4H2QFMuQXvY9jUgxbakOm4=fRz=FMoMJAyc=q...@mail.gmail.com,
dated Tue, 3 Jul 2012, Kevin Robinson kevinrobinso...@gmail.com
writes:
Questions like What does the term creepage distance mean? would be
perfect , however the challenge that I am facing is finding questions
-
From: Kevin Robinson [mailto:kevinrobinso...@gmail.com]
Sent: Tuesday, July 03, 2012 11:38 AM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: [PSES] Interview Questions
Hello All,
I have recently been tasked with writing a set of questions that job
candidates would need to answer at the same time
This has the makings of an extremely esoteric pub quiz, if we're not careful!
Here is one, adapted from a phone enquiry I dealt with this morning this
morning:
You have two appliances. One is marked 110 - 230V ~50Hz and the other is
marked 110/230V ~50Hz. What do you look for on one which is
You could ask them for a hipot voltage per 5.2.2; I don't believe the table
is available via google; you would also be able to evaluate their useage
of the table, conversion from RMS to Peak voltage, AC vs DC, etc.
You could also ask them to summarize the requirements for a fire or
mechanical
Not sure this is what you are looking for; but the 110-230V unit is rated
as a range, so the tolerance would be below 110 and above 230. The 110/230
V has two distinct rating ranges, so the tolerances would be above and
below 110 AND above and below 230VAC. That's the first thing that pops
into
Pre-screens that attempt to minimize consumption of a candidates' time is a
good thing.
What if the candidate logs in to answer one or two questions that evaluate
engineering judgment and/or problem solving? Perhaps you have to consider
that the knowledge of... stuff cannot be used as a
I believe Nick may be fishing for the answer - a voltage selector switch.
Back to the original question... Of course, an interview is much better for
assessing this type of knowledge, but if you have to have questions on an
application where candidates fill it out from home, you could ask
First prize to Scott. Well done.
Nick.
On 3 Jul 2012, at 20:59, Aldous, Scott wrote:
I believe Nick may be fishing for the answer - a voltage selector switch.
Back to the original question… Of course, an interview is much better for
assessing this type of knowledge, but if you have to
Japan, and some Carribean stuff - does knowledge of this fact make me a
better compliance person? No.
And a voltage switch is NOT necessarily required. Think auto-switch power
supplies.
Brian
-Original Message-
From: emc-p...@ieee.org [mailto:emc-p...@ieee.org]On Behalf Of IBM Ken
Sent:
In message 58cfc7eacb1a43f3bc5033c323f55...@tamuracorp.com, dated Tue,
3 Jul 2012, Brian Oconnell oconne...@tamuracorp.com writes:
Japan, and some Carribean stuff - does knowledge of this fact make me a
better compliance person? No.
I think it was just an aside question. But Japan is 100 V,
In message
CAKEabA3B=iqyzpyjzmb5tjdewp+eowdq40fu9dh88oah6a1...@mail.gmail.com,
dated Tue, 3 Jul 2012, IBM Ken ibm...@gmail.com writes:
PS: Who operates at 110VAC 50Hz?
Portable equipment used on construction sites; it's actually 55-0-55,
with the centre grounded.
--
OOO - Own Opinions
] Interview Questions
I believe Nick may be fishing for the answer - a voltage selector switch.
Back to the original question... Of course, an interview is much better for
assessing this type of knowledge, but if you have to have questions on an
application where candidates fill it out from home
]
Sent: Tuesday, July 03, 2012 12:59 PM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] Interview Questions
I believe Nick may be fishing for the answer - a voltage selector switch.
Back to the original question... Of course, an interview is much better for
assessing this type of knowledge
Isn't there a difference between auto-switching and auto-ranging?
Gary
From: Ron Pickard [mailto:rpick...@equinoxpayments.com]
Sent: Tuesday, July 03, 2012 1:49 PM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] Interview Questions
Hi Scott,
That's not always the case. I've had experience
-Original Message-
From: Brian Oconnell [mailto:oconne...@tamuracorp.com]
Sent: Tuesday, July 03, 2012 12:46 PM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] Interview Questions
Pre-screens that attempt to minimize consumption of a candidates' time is a
good thing.
Reminds
Engineering
From:
John Woodgate j...@jmwa.demon.co.uk
To:
EMC-PSTC@LISTSERV.IEEE.ORG
Date:
07/03/2012 12:06 PM
Subject:
Re: [PSES] Interview Questions
In message
CADYqxLATv+VVo4H2QFMuQXvY9jUgxbakOm4=fRz=FMoMJAyc=q...@mail.gmail.com,
dated Tue, 3 Jul 2012, Kevin Robinson kevinrobinso...@gmail.com
, Gary gary.mcintu...@esterline.com
To:
EMC-PSTC@LISTSERV.IEEE.ORG
Date:
07/03/2012 12:10 PM
Subject:
Re: [PSES] Interview Questions
Well don't try - what is the sound of one hand clapping I asked Siri
(iPhone assistant thingy) and she gave me an answer. (Silence)
Try to avoid definitions and work
110 V~ 50 Hz countries:
Jamaica
Lebanon
Some selected areas in some countries may have 110 V~ even though that
is not the norm for the rest of the country.
On 7/3/2012 3:43 PM, IBM Ken wrote:
Not sure this is what you are looking for; but the 110-230V unit is
rated as a range, so the
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