AND, as I should have said, obtained up-to-date copies of the certification
docs!
John E Allen
W. London, UK
From: Regan Arndt [mailto:reganar...@gmail.com]
Sent: 21 September 2017 21:39
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: [PSES] Safety critical component part #'s and Agency approval
Datasheets!
Mainly marketing “BS”!
Never believe them until you have checked in DETAIL with the mfr AND the
certification bodies!
John E Allen
W. London, UK
From: IBM Ken [mailto:ibm...@gmail.com]
Sent: 21 September 2017 21:44
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] Safet
Rich & Friends
I, too in a past life at HP at Bristol, took the same approach of making sure
that our processes and productions were well in excess of what past experience
had shown that UL/CSA inspectors had looked for – and, albeit with a couple of
minor “glitches”, that resulted in a pre
And, as an example of “sorting” a supplier, we began to get hipot failures on
a product and tracked it down to a simple IEC power outlet which was flashing
over – the problem was finally tracked down to the supplier of the outlet
assembly having changed the flux used for soldering wires to the
<http://www.jmwa.demon.co.uk/> www.jmwa.demon.co.uk J M Woodgate and
Associates Rayleigh England
UK is a sovereignty, not a Zollverein-ty
From: John Allen [mailto:09cc677f395b-dmarc-requ...@ieee.org]
Sent: Friday, September 22, 2017 9:05 PM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject
Having had a look at 62368-1 Ed 2, I think the relevant clause in that is
5.5.7. “SPDs” (“Surge Protective Devices”),
5.5.7.1 “Use of an SPD between the mains and earth”
“Where a varistor is used between the mains and earth:
– the earth connection shall comply with 5.6.7; and
– the varisto
Could there also be various high frequency sources within the lamps
themselves which would are not filtered by the filters external to the
chamber (and the lamps may not have properly shielded bodies and/or lenses)?
John E Allen
W.London, UK
From: John Woodgate [mailto:j...@woodjohn.uk]
S
Hi,
We have a pickle of a situation and wondering if anyone knows a simple
fix.
We have a moving wall that complies with the maximum force limits of UL962.
An IC measures the voltage of a resistor and if appropriate, allows the correct
current to be sent to a motor that moves the wal
Thanks everyone!
Either test or re-design is required.
I appreciate the input.
John
From: Doug Powell
Sent: Tuesday, November 28, 2017 2:07 PM
To: John Allen
Cc: EMC-PSTC
Subject: Re: [PSES] Pickle
John,
UL 991 is a test method for qualifying solid-state
.
Thanks again for the input and help,
John
From: John Allen
Sent: Tuesday, November 28, 2017 3:02 PM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] Pickle
Thanks everyone!
Either test or re-design is required.
I appreciate the input.
John
e: [PSES] Pickle
Is 'QVGS2' a new CCN?
Brian
From: John Allen [mailto:jral...@productsafetyinc.com]
Sent: Thursday, November 30, 2017 8:51 AM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] Pickle
Hi,
To pass along the learning that came out of this.
A fuse did not have
Probably due to Putin's desire to promote (by any means - including
regulation!) for everything to be done in Russia, not elsewhere!
John E Allen
W. London, UK
From: Carl Newton [mailto:emcl...@gmail.com]
Sent: 03 December 2017 22:20
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] EAC
to have some 'dodgy' test houses, too, so it
may not be all political.
John Woodgate OOO-Own Opinions Only
J M Woodgate and Associates www.woodjohn.uk
Rayleigh, Essex UK
On 2017-12-03 22:45, John Allen wrote:
Probably due to Putin's desire to promote (by any means - including
r
PS: Now recalled that Russia is part of the "Eurasian Economic Community"
(EEC!!), as is Belarus - but we don't need to guess which the dominant
partner in "that" EEC is!
John E Allen
W/London, UK
From: John Allen [mailto:09cc677f395b-dmarc-requ...@ieee.org
From: Cortland Richmond [mailto:k...@earthlink.net]
Sent: Monday, December 04, 2017 5:08 AM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] EAC Mark in Russia
If so, it would not be the first time governments have used existing
regulations to erect trade barriers.
Cortland Richmond
2017 5:45
ot be the first time governments have used existing
regulations to erect trade barriers.
Cortland Richmond
2017 5:45 PM, John Allen wrote:
Probably due to Putin's desire to promote (by any means - including
regulation!) for everything to be done in Russia, not elsewhere!
John E Allen
W.
ant
PO Box 23427
Tigard, ORe 97281-3427
503/452-1201
<mailto:p.perk...@ieee.org> p.perk...@ieee.org
From: John Allen [mailto:09cc677f395b-dmarc-requ...@ieee.org]
Sent: Monday, December 4, 2017 6:57 AM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] EAC Mark in Russia
Bria
UL, AND every other certification body – especially if there is “money” in it L
From: Kunde, Brian [mailto:brian_ku...@lecotc.com]
Sent: 07 December 2017 21:48
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] Pilot rating
UL does not have a sense of humor that we are aware of.
TOB
Anyone remember those old TV IR remote controls? - absolutely PBA!
Hope this "new" technology is a lot better!
From: Edward Price [mailto:e...@jwjelp.com]
Sent: 11 December 2017 18:44
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] Li-Fi
I seem to recall HP was touting some kind
Also being a "Ted", (middle name is Edward, and Ted was how most people
referred to my Dad - Obviously also an "Edward"!) but never liked it, Mr
Eckert has my "full support" J
From: Ted Eckert [mailto:07cf6ebeab9d-dmarc-requ...@ieee.org]
Sent: 11 December 2017 22:16
To: EMC-PSTC@LISTSERV.I
Or maybe Digital Research DRDOS?
(DRDOS 6 was, for its time, “brilliant” IMHO, and a lot better than the
then-current Microsoft equivalent J)
From: John Woodgate [mailto:j...@woodjohn.uk]
Sent: 20 December 2017 22:04
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] CI Software Flicker/Harm
FWIW,
Brian could also see if it is possible to run the XP-based system under
virtualization s/w (such as VWware - which I use to run a VERY old 16-bit game
that can otherwise only be run under W7, or earlier, 32 bit - but I know
"without actually knowing" that other virtualization apps could b
This is a close parallel to the scenario where some gets a “shock” from the
very small amount of residual stored energy in an appliance filter which has no
bleeder resistors and is fitted on the supply side of the Mains ON/OFF switch.
It “wakes them up” but does little actual harm – unless,
I don’t think the footnote was in the Blue Guide at the time (c2000) but that’s
what I decided that we had to do, and to specify to trials teams (ours’ and the
customers’), when we put prototype military equipment out for field trials –
but sometimes it was difficult to persuade everyone (especi
Good afternoon.
Just received this info email from Intertek in the UK, followed the link and
downloaded the White Paper – it should be of interest to anyone who wants to
know the changes and additions.
Adds quite a number of requirements, such as for socket-outlets with built-in
USB pow
Hi,
We’re looking for a battery safety expert to join us on a project. They need
to be very current on high performance lithium-ion packs as the current best
practices lead the standards a bit.
Please contact me directly.
Best Regards,
John
John Allen
Product Safety Consulting, Inc
Rich
Steps 1 to 4 are perfectly “sensible” but one needs to formalize the analysis –
and methods like doing a Failure Modes Effects Criticality Analysis (FMECA) are
not that “simple” when one has to do it in sufficient detail to prove the point
(“been there, done that”)!
John E Allen
W
Have you tried to isolate the original source of the noise - and then to
supress that?
John E Allen
W. London, UK
From: McBurney, Ian [mailto:ian.mcbur...@allen-heath.com]
Sent: 26 April 2018 11:33
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: [PSES] Mains Conducted rf emissions measurements
Hi,
We're looking for a Field Evaluation Engineer for the USA Midwest area. Anyone
interested or knows someone, please contact me directly.
Best Regards,
John Allen | President | Product Safety Consulting, Inc.
Your Outsourced Compliance Department®
630-238-0188
www.productsafetyin
To clarify, this role is for a Product Safety Engineer who will do compliance
evaluations in the field. Must have a real good working knowledge of the NEC
and a good mix of product experience.
John Allen | President | Product Safety Consulting, Inc.
Your Outsourced Compliance Department®
http://www.psessymposium.org/pages/62368-1-open-forum
John Allen | President | Product Safety Consulting, Inc.
Your Outsourced Compliance Department®
630-238-0188
www.productsafetyinc.com<http://www.productsafetyinc.com/>
<http://www.productsafetyinc.com/>
President - IEEE Product S
TRAC was subsumed into the larger multinational company "ELEMENT" a year or
two, and so you might want to widen your question/search.
John E Allen
W. London, UK
From: Amund Westin [mailto:am...@westin-emission.no]
Sent: 14 May 2018 21:07
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: [PSES] TRAC
Having been asked to do an RAR on very "difficult" project (a substantial
update to the MoD/Quinetiq rocket projectile testing range control system
at Pendine Sands in S. Wales!) some years ago, before I did that I made it
very clear to the customer's Project Safety Engineer that - given the very
J
-Original Message-
From: Brian O'Connell [mailto:oconne...@tamuracorp.com]
Sent: 18 May 2018 19:26
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] Customer Requests for Risk Assessments
Long ago, when men were men, women were women, and dogs did not wear scarfs
(sometime la
Ghery
"Thanks" for that link - seems like we should all stop drinking/using WATER.
Then just die of thirst and/or malnutrition and/or illness due to lack of
basic hygiene! ;)
Just goes to "show" that almost EVERYTHING (including thus EMF!), in "life"
comes with "risks" - but didn't we all a
In other words, become an "aquaphibian" (or something like that :) ) – “back to
the Future” J
-Original Message-
From: Brian O'Connell [mailto:oconne...@tamuracorp.com]
Sent: 05 July 2018 22:04
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] EN62311 - Human Exposure to Electromagne
Also used in Malta and Cyprus (even in “Turkish” Northern Cyprus IIRC!) – and
then there is Gibraltar.
John E Allen
W. London, UK
From: John Mcauley [mailto:john.mcau...@cei.ie]
Sent: 16 July 2018 01:03
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] Safety design of shutter opening
Look for relevant Type B and specific Type C EN standards.
John E Allen
W.London, UK
From: Pete Perkins [mailto:0061f3f32d0c-dmarc-requ...@ieee.org]
Sent: 02 August 2018 13:29
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: [PSES] CE marking of machinery that moves about
Colleagues,
Having, over the years (!), seen a few TRF’s, I totally agree with the 1st
sentence below – absolutely of no use to the “average” engineer in most
companies, other than the test labs, because the “correct answers” are in the
eyes of the beholders as there are so many possible interpretations an
Head in hands - and liability insurance paper in back pocket (hopefully)!
From: James Pawson (U3C) [mailto:ja...@unit3compliance.co.uk]
Sent: 30 August 2018 13:18
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] CE marking - mixture of responsibilities
Charlie, John, thanks for the insig
"Been there, seen that" OH SO many times ! L
Emphasises the need for a defined "cradle to grave" Project Lifecycle which
includes the Project Compliance targets at each stage, and with the
responsibilities laid out in some detail so that progress can be accurately
forecast and monitored - and t
Brian
Commiserations on yourself "no longer needed" (really?) - but I hope/am
sure that you will soon find a more-realistic company with a rewarding
position J.
John E Allen
W. London, UK
PS: I can say, with relative certainty, that before retiring a few years
ago, I had "been there,
Hi,
We're in need of a Functional Safety expert to join our project. Please
respond directly to me.
Best Regards,
John
jral...@productsafetyinc.com
-
This message is from the IEEE Product Safety Engineering Society emc-pstc
Tom
Ref those 200V products: are they single phase 2-wire (Neutral + Live) +
Ground, OR split-phase (100V on each of 2 Live legs) + Neutral return?
(IIRC, it is the latter - probably introduced as a result of North American
influence where that configuration is common for high consumption
applianc
uk
Cc: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] Japanese manis leads
John,
On Fri, 7 Dec 2018 14:40:26 -,
"John Allen" wrote:
> Ref those 200V products: are they single phase 2-wire (Neutral + Live) +
> Ground, OR split-phase (100V on each of 2 Live legs) + Neutral r
FWIW, I was always deeply skeptical of the “(Pass, Fail, N/A)” criteria in the
TRF’s because those were, and generally still are, almost totally dependent on
“the eye of the beholder”, i.e. whoever does the compliance assessment! An
(absolutely terrible!) example of that was what I found (in a c
oduct Safety and Compliance
https://ewh.ieee.org/soc/pses/index.html
John Allen | President | Product Safety Consulting, Inc.
Your Outsourced Compliance Department®
630-238-0188
www.productsafetyinc.com<http://www.productsafetyinc.com/>
Although PSC maintains the highest lev
Doug
As I am sure that many others will confirm, that CEE 7 socket does NOT have any
defined polarity for the Live/Line and Neutral contact tubes, and thus the
Line/Live and Neutral wires to those contact tubes can & are connected either
way around according to the “wim” of the installer – u
e in France and Belgium.
Best wishes
John Woodgate OOO-Own Opinions Only
J M Woodgate and Associates www.woodjohn.uk
Rayleigh, Essex UK
On 2019-02-22 18:13, John Allen wrote:
Doug
As I am sure that many others will confirm, that CEE 7 socket does NOT have any
defined polarity for the Live/Line
anyone here know?
Best wishes
John Woodgate OOO-Own Opinions Only
J M Woodgate and Associates www.woodjohn.uk
Rayleigh, Essex UK
On 2019-02-22 20:23, John Allen wrote:
John
Regardless of whether or not a CEE 7 plug is (and, apart from that particular
version of the CEE 7 plug, almost, if not all
Don't forget NAFTA-related issues (especially in the "DJT Wall" context!) as
Mexico probably cannot afford to be "too liberal" in what it can accept with
the minimum of "bureaucratic rules" whilst still trying to protect its
in-house labs & certification bodies as far as it legally can!
John E
I've had several probably "nasty" emails from sources that appeared to have
spoofed some of the email addresses used by myself and several people that I
know, but please don't confuse me with John R Allen of Product Safety Inc.
FWIW, I don't think the data breach in question was specific to UK
IMHO, the subject of “tamper-proofing devices” will be around for a “long time”
because, once a “new” device is introduced, then “someone” will (pretty soon!)
come up with a “workaround” – it’s just a case of when the workaround becomes
available, and then when will someone find and use it, and
upt dealings, especially in order to influence
improperly (usually followed by with )
The example provided by John Allen (UK) is not tampering as he did not take the
unit apart for any of the above reasons. Using the above definitions, the
reasons for using any “tamperproof” construct
.
John E Allen
W. London, UK
From: John Woodgate [mailto:j...@woodjohn.uk]
Sent: 09 April 2019 09:40
To: John Allen; EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] Tamper-proof Hardware
I think that the major point is that Clause 0 is purely advisory. It seems
reasonable in an
should never have been included in the first place.
John E Allen
W. London, UK
From: John Woodgate [mailto:j...@woodjohn.uk]
Sent: 09 April 2019 09:40
To: John Allen; EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] Tamper-proof Hardware
I think that the major point is that Cla
An interesting question, and, from the text of Schedule 1, I would guess
that these are technically excluded (though, for why, I have no idea).
In addition, that same exclusion would appear to include all the power line
comms devices which use the mains supply network and also any BS1362 socket
Ed
A resend of the essage earlier today because it was too big due to the
attachments, which I have now replaced with the URL's as suggested.
Regards
John
--
From: John Allen[SMTP:john.al...@rdel.co.uk]
Sent: 28 October 1999 10:26
To: emc-p...@majordomo.ieee.org; &
icular market(s) as these may not be within the remit of the specific
standards (if any) for the market and product - but are coming to have a
distinct effect on the equipment that is actually acceptable to the
customer for a particular application (bitter experience!)
Regards
John Allen
Product
review BS 7671"Requirements for Electrical Installations" -
otherwise known as the "IEE Wiring Regulations" (which I believe you may
use in Hong Kong) and its associated Guidebooks.
Regards
John Allen
--
From: raymond...@dixonsasia.com.hk[SMTP:raymond...@dixonsas
ch circuits covered by 15/16A fuses or breakers, and
where the legal requirements on access to the pins are much less stringent
than the UK - does anyone know where this might be?
Regards
John Allen
Racal
Bracknell
UK
PS:
The above is not rumour - I have actually seen and examined items of t
main reason is that the power cord cross-sectional (0.75 - to 1.5 sq
mm) area is much less than that of the ring main (2.5 to 4 sq mm) , and
fuses have to be inserted wherever such a change occurs.
Fusing in the appliance is to protect the appliance - not the power cord.
Regards
John Al
.
Regards
John Allen
--
From: wo...@sensormatic.com[SMTP:wo...@sensormatic.com]
Sent: 09 November 1999 16:59
To: emc-p...@majordomo.ieee.org
Subject:Finding Directives
I am attempting to locate 97/129/EC (ID system for packaging materials). I
found it at EUR-LEX, but the
nt for
use by untrainned personnel.
Additionally, you might want to look at the access and interlock
requirements standards called up under the Machinery Directive 98/37/EC and
the guidance information put out by authorities such as the UK Health &
Safety Executive.
Regards
John Allen.
instructions
that no-user servicing is permitted. You might even have to make access
inside the equipment very difficult by sealing the construction or by using
special security fixings that cannot be opened with "normal" handtools.
Regards & Happy Xmas
John Allen
Racal Defen
Hi Folks
The URL for the General Product Safety Directive (92/59/EEC) is:
http://europa.eu.int/eur-lex/en/lif/dat/1992/en_392L0059.html
I just looked - it is there.
Regards
John Allen
--
From: Colgan, Chris[SMTP:chris.col...@tagmclarenaudio.com]
Sent: 08 December 1999 09:46
To
the operation of non-compliant radio transmitting
equipment.
This approach is also reflected in the proposed UK legislation that I
pointed to in my posting "R&TTE Directive - Transitional Periods" on 30
November.
Regards
John Allen
Racal
PS: No-body has so far reacted to that
o are the solutions in order to comply with the "due dilegence"
(etc) issues.
Let's see what other people think!
The above opinions are my own interpretations, but are those I promote
within our company.
John Allen
Product & System Safety Manager
Communicatio
mails from this
address!!
Luckily it was caught by our corporate firewall, but I then received the
following message from the people administering the firewall. Their message
is given below for your information.
Regards
k - are the dis-advantages of the new regime out-weighed
by the advantages?
Regards
John Allen
Racal Defence Electronics Ltd
Bracknell
UK
-
This message is coming from the emc-pstc discussion list.
To cancel your subscription, send mail to majord...@ieee.org
with the single line: "
Peter
I (and probably a number of other people) would be most grateful to know
where you got the guidance for Europe - can you point me in the right
direction please?
Many thanks
John Allen
Racal Defence Electronics Ltd.
--
From: Peter Merguerian[SMTP:pmerguer...@itl.co.il]
Sent
(+ VAT), but is probably now nearer ?500 if it
is still available.
The address is;
Clare Instruments Ltd
Woods Way
Goring by Sea
Worthing
West Sussex NB12 4QY.
Tel: 01903-502551
Fax: 01903-244258
Regards
John Allen
Racal Defence Electronics Ltd
Bracknell
--
From: Crabb, John[SMTP:jo
ot then guarantee the continued compliance of the product!
"Think about it" if you don't have the control procedures - or even if
you do but don't enforce them properly!!
Regards
John Allen
Racal
--
From: Scott Douglas[SMTP:s_doug...@ecrm.com]
Sent: 11 November 19
/or model names/number change.
The above opinion is my own, but I can see no reason why we - or any other
company - should take any different view.
Regards
John Allen
Product & System Safety Manager
Racal Defence Electronics Ltd
Bracknell
UK
--
From: Scott Douglas[SMTP:s_doug...@e
in PDF are also available via an email request -
but again I cannot say what the policy is for non-UK companies.
Regards
John Allen
-
This message is coming from the emc-pstc discussion list.
To cancel your subscription, send mail to majord...@ieee.org
with the single line: "unsu
nts, and I know that the
instrumentation division of our company is already applying it (in
conjunction with IEC/EN 611010 for safety).
I am sure that someone in the instrumentation business can confirm and
elucidate on my comments.
Regards
John Allen
--
From: bogda...@pacbell.net[
- to the best of my knowledge -
have no trouble anywhere (unless something else is called up in contract!)
Regards
John Allen
Product Safety Manager
Racal Radio Ltd.
--
From: Crane, Lauren[SMTP:lcr...@bev.etn.com]
Reply To: Crane, Lauren
Sent: 27 April 1999 18:27
To
as I don't think
european wiring codes inspectors would be very "happy" - just think what
your local inspectors would say if we sent European wiring colour-coded
equipment to the US and did'nt use grey/white for neutrals where specified
in the NEC.
Regards
John Allen
: www.era.co.uk
According to their recent literature, the next course is on 4 May and then
again in October.
I have been on one of these courses and they are not bad (if a little "heavy"
at times!)
Regards
John Allen
cc: Laura Viscione, ERA
FYI as a lot of people who subscribe to th
ecks which I consider to be very sensible and very much
along my own lines of thought (based on quite a few years in this business!).
(The above opinions and comments are my own and should not be interpreted as
necessarily being those of my company.)
Regards
John Allen
Racal Radio Ltd
Exporters (THE) group which had an
information pack on the subject - try 0181-996-7111 (+44-181-996-7111) although
there will probably be a charge for the information. The information may also
be available to non-UK companies - but the charges are liable to be higher!!
Regards
John Allen
And don’t forget about the work on mobile robots -R15.08 American National
Standard for Industrial Mobile Robots and Robot Systems
Best Regards,
John
John Allen
Product Safety Consulting, Inc
www.productsafetyinc.com<http://www.productsafetyinc.com>
On Jul 27, 2019, at 10:08 PM, Richar
An “easy one” for us “oldies” but I’m sure that John Woodgate will quickly
reply “in detail” – the frequency limit relates directly to the “old” Long
Wave” frequency band, which starts at 150kHz! J
John E Allen
W. London, UK
From: 06cee064502d-dmarc-requ...@ieee.org
[mailto:06ce
Ted
Just a very minor clarification regarding appliance couplers – non-filtered
ones don’t provide direct Ground connections to the chassis. Obvious I know,
but could be overlooked.
John E Allen
W. London, UK
From: Ted Eckert [mailto:07cf6ebeab9d-dmarc-requ...@ieee.org]
Sent: 24 S
Which is possibly why there a "few" phone fires, especially when charged
from the host of "cr*p"/dangerously poor 3rd-party chargers that are widely
available (I am very careful with both the phones and the chargers that -
occasionly, every 3-4 years - I buy).
John E Allen
W. London, UK
-Orig
Quick search on “80/80 rule history” yields (for a start!):
“It was named after it's founder, the Italian economist Vilfredo Pareto, back
in 1895. He noticed that people in society seemed to divide naturally into what
he called the “vital few,” or the top 20 percent in terms of money and
influe
e and Associates www.woodjohn.uk
Rayleigh, Essex UK
On 2019-11-18 20:02, John Allen wrote:
Quick search on “80/80 rule history” yields (for a start!):
“It was named after it's founder, the Italian economist Vilfredo Pareto, back
in 1895. He noticed that people in society seemed to divide natu
John W & Friends
Earlier this afternoon, we were visiting a friend of my wife and her partner –
and, later during a general conversation, the latter and I got around to “risk
assessment” (in the context of the Grenfell tower block fire disaster a couple
of years ago), and so I outlined to hi
Typo in the email below: - see highlighted words! L
From: John Allen [mailto:john_e_al...@blueyonder.co.uk]
Sent: 30 December 2019 21:24
To: 'John Woodgate'; 'EMC-PSTC@LISTSERV.IEEE.ORG'
Subject: RE: [PSES] [EXTERNAL] Re: [PSES] act of God versus safety
John W &
Rich, et al
AH, now you are getting to the “specifics” J
Whilst I (and many others!) are very well aware of all those other
“contributory factors” (some of which I also outlined to SWMBO’s friend’s
partner!), I didn’t want to “go into that level of detail” in my initial post
>From som
it website?
Thanks,
John Allen
PSC - USA
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This message is from the IEEE Product Safety Engineering Society emc-pstc
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Thanks John!
Here's the link to the subject site -
https://codebookdownload.com/
Best Regards,
John
John Allen | President & CEO | Product Safety Consulting, Inc.
Your Outsourced Compliance Department(r)
630-238-0188
John Allen-Past President - IEEE Product Safety Engineering Soc
Thanks Derek!!
If you have any questions, please don't hesitate to contact me.
Best Regards,
John
John Allen | President & CEO | Product Safety Consulting, Inc.
Your Outsourced Compliance Department®
630-238-0188
www.productsafetyinc.com<http://www.productsafetyinc.com/>
Yup
Old electrolytics need “time” and, IIRC, a gradually increasing voltage to
reform before one applies the “full voltage”!
I’ve probably told this story before, but, when at school “some decades” ago I
built a valve/tube oscillator from stuff in a “junk pile” that I had bought
from
Hi,
I hope everyone is good, healthy and being safe.
Does anyone have an accurate explanation of how a fuse can be UL Listed vs UR?
A fuse cannot stand alone as with other UL Listed products.
UL categories are JDYX, JDYX2
Thank you and Be Safe,
John
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ernal to a device where
they are within a fire enclosure and only accessible to service personnel.
This is a bit of an oversimplification, but I hope it helps clear it up a
little.
Regards,
Ted Eckert
The opinions expressed do not necessarily reflect those of my employer or UL.
This is great information, thank you Scott.
And thanks to everyone else who guided an old school compliance guy - We’re
always learning!!
Be safe out there,
John
From: Scott Aldous
Sent: Tuesday, May 12, 2020 10:47 AM
To: John Allen
Cc: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] UL
I believe most Standards that have a requirement regarding it, require bleed
off within 60 seconds.
From: Pete Perkins <0061f3f32d0c-dmarc-requ...@listserv.ieee.org>
Sent: Wednesday, September 30, 2020 10:48 AM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] [EXTERNAL] Re: [PSES] electric
have worked in many product categories and have
managed engineers give me a call to discuss the opportunity.
If you have any questions, please don't hesitate to contact me.
Best Regards,
John
John Allen | President & CEO | Product Safety Consulting, Inc.
Your Outsourced Compliance Departme
Very well put Dan. Where in the risk assessment does it talk about “prudent
avoidance”? A toaster is hot and has uninsulated live parts accessible while
energized with a known shock hazard.
Have a nice weekend!!
Best Regards and Be Safe,
John
John Allen
President & CEO
Product Sa
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