Hi Scott,
That's not always the case. I've had experience with auto-ranging 120/240V 
products where no voltage selector switch was needed.

Best regards,

Ron

From: Aldous, Scott [mailto:[email protected]]
Sent: Tuesday, July 03, 2012 12:59 PM
To: [email protected]
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, but if you have to have questions on an 
application where candidates fill it out from home, you could ask questions 
based on personal experience, such as "describe an experience you have had 
where you solved an issue with creepage distance and how you did it" or 
something like that. People could always just lie and make something up, but it 
should be pretty easy to tell if someone has no idea what they're talking 
about. Much harder to Google this type of specific problem and solution, I 
would think.

Scott Aldous
Compliance Engineer
AE Solar Energy

  +1.970.492.2065 Direct
  +1.970.407.5872 Fax
  +1.541.312.3832 Main
[email protected]<mailto:[email protected]>
1625 Sharp Point Drive
Fort Collins, CO 80525

www.advanced-energy.com/solarenergy<http://www.advanced-energy.com/solarenergy>


From: [email protected]<mailto:[email protected]> 
[mailto:[email protected]]<mailto:[mailto:[email protected]]> On Behalf Of IBM 
Ken
Sent: Tuesday, July 03, 2012 1:43 PM
To: Nick Williams
Cc: Kevin Robinson; 
[email protected]<mailto:[email protected]>
Subject: Re: Interview Questions

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 mind, anyway.

PS: Who operates at 110VAC 50Hz?



On Tue, Jul 3, 2012 at 3:21 PM, Nick Williams 
<[email protected]<mailto:[email protected]>> wrote:
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 missing from the 
other?

I'll let the group answer.

Nick.

On 3 Jul 2012, at 19:38, Kevin Robinson wrote:

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 mechanism.  Questions like "What does the term creepage
distance mean?" would be perfect , however the challenge that I am
facing is finding questions that the answers are not easily found
using Google.  If anyone has any product safety related questions that
they would not mind sharing, I would greatly appreciate it.

Kevin Robinson

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