Richard -
Bob Johnson's response on your Q1 is on the money.
wrt your Q2 and outlet strips, there may be the additional
consideration that you may impinge on the scope of UL1363,
Relocatable Power Taps (formerly a desk standard for
Temporary Power Taps), Listed under the CCN XBYS. Point
being,
I haven't followed the Woodgate approach :), hopefully the
information Rich discovered also includes such relevant
concerns as:
power factor for general use
power factor for inductive/motor loads
power factor for pilot duty loads
heavy power factor (perhaps as low as 0.10)
incandescent
Jim -
Try the Swedish EPA at
http://www.internat.environ.se/
Regards,
Peter L. Tarver, PE
Product Safety Manager
Sanmina-SCI Homologation Services
San Jose, CA
peter.tar...@sanmina-sci.com
-Original Message-
From: Jim Eichner
Sent: Friday, August 09, 2002 11:51 AM
We have had
All interested -
The IEC has just announced an upcoming on-line IEC 60417
symbol library will be made available soon (I checked and
it's not yet available through the IEC Web Store). Don't
expect to access them gratis, as they once were on the Chiba
University, Ikeda Lab web site (even though
Greg -
In point of fact, no NFPA standards are addressed by federal
law (keep in mind, regulation is not law, even if given the
power of law). Even 29CFR, as far I have seen, doesn't
outright adopt the Code in toto, but references portions of
it variously as mandatory or recommended.
NFPA 70
I must throw in with Rich Nute on this topic. The need for
a marking in this instance is very context sensitive: if the
marking is required by the US standard, but not by the
Canadian standard, the marking does not need to be
translated into French. Otherwise, there is no legal
requirement.
Jim -
There are no orientation requirements in the NEC or CEC,
except as required by product marking, such as for some GFCI
receptacles.
Dimension requirements are secret, donchaknow.
Regards,
Peter L. Tarver, PE
Product Safety Manager
Sanmina-SCI Homologation Services
San Jose, CA
Bill -
Go to the IEC web site (http://www.iec.ch/index.html). From
Search, select Information on a TC/SC under Technical
Work, then enter 48D when the page loads. You'll see the
chair and secretary names and a link to a list of links to
member states that then link to contacts from whom you
This reaches back a bit and I hope you'll forgive my tardy
entrance. I come from a test house background and would
like to shed some light on certain assertions made in this
thread.
Scott Douglas tells us, In my years of being a compliance
type, I have found many cases where I could not get an
While this is belaboring the issue and, other than if I
happen to run across any relevant standards references, it
should be noted that most new and many updated standards we
have to deal with are written using SI as the primary and
sometimes only units.
Also, in most scientific and engineering
RE, our recent discussions on unit prefixes: I ran across a
standard in my stash, IEC60027-1, Letter Symbols to be Used
in Electrical Technology is another reference for this
topic. The base standard is dated 1992, with Amendment 1
dated 1997. The IEC web site identifies four dash
standards,
Ron -
I do not have a view on publication of EN60950-1 in the OJ,
but the IEC Web Store indicates a Technical Report Form was
created in APR2002 and is available.
Regards,
Peter L. Tarver, PE
Product Safety Manager
Sanmina-SCI Homologation Services
San Jose, CA
peter.tar...@sanmina-sci.com
Joe -
I don't have a copy of EN60950-1, however IEC60950-1
includes a note to Subclause 6.1.2.1 that reads, In
Finland, Norway and Sweden, there are additional
requirements for the insulation. In the EN version, what
is difference from the base standard this note refers to, if
the Supplementary
Terry -
Part 11 of 21CFR is related to electronic reporting and
electronic signatures for submittals to the FDA; I don't
believe there's any certification program for Part 11,
just a process/procedure to follow. Refer to
http://www.fda.gov/ora/compliance_ref/part11/
for details.
Regards,
John -
I respectfully disagree that the standards bodies need to do
anything. It is the designers that must be aware of the
advancements of technology (such as described by Gert) and
update their practices accordingly. [Low ESR / High Q caps
are a good thing.] While I have no doubt about the
Rich and Scott -
Irrespective of how any test house decides to address
indicator LEDs, my discussions with TC76 members and
contributing experts, including Bob Weiner and Jerome
Dennis, as well as the remainder of the members at a panel
discussion at the 1997 Laser Institute of America
Darren -
the Japan mains voltage in the range you request is 100V.
As I understand it, though this is open to correction, Japan
has both 50Hz and 60Hz distribution systems, depending upon
where you are located, even on the large island. I do note,
however, that the US Dept. of Commerce's
Joe -
Your statement is not in all cases.
Please refer to GR1089, 4.5.3, R4-3, -4, -5, 4.6.1, and
CR4-29
Although not a requirement, refer also to 4.5.13, Item 10,
related to R4-18.
Regards,
Peter L. Tarver, PE
Product Safety Manager
Sanmina-SCI Homologation Services
Pierre Rich -
At one time, I had to perform such testing, but it's too
long ago and was so infrequently necessary that I've lost
all details. However, I did save one of the tablets in a
35mm film canister. My note on the outside says
hexamethylene tetramine C16H12N4, that last bit being the
Richard -
If the monitor contains a CRT, the requirement in question
may arise from 21CFR, rather than UL. The responsible
company needs their name and address marked on products.
Regards,
Peter L. Tarver, PE
Product Safety Manager
Sanmina-SCI Homologation Services
Tajudeen -
Sanmina-SCI can provide these consulting services.
Please refer to my contact information, below.
Regards,
Peter L. Tarver, PE
Product Safety Manager
Sanmina-SCI Homologation Services
355 E. Trimble Rd.
San Jose, CA 95131-1218
V: 408-474-1322
F: 408-474-1318
M: 408-234-3529
An excellent resource, John. Thank you.
Regards,
Peter L. Tarver, PE
Product Safety Manager
Sanmina-SCI Homologation Services
peter.tar...@sanmina-sci.com
-Original Message-
From: Jon Griver
Sent: Tuesday, January 22, 2002 9:59 PM
Peter,
An excellent place to start your search
All -
I have been asked to look into medical device requirements
in Asia. This would include Pacific Rim and other Asian
countries (the request was not specific, despite a little
prodding). I am only beginning my research and would
appreciate any pointers you might be able to provide that
will
Brian and others interested -
CSA/UL90950-1 will be discussed in a tentatively scheduled
meeting in April at the UL60950 Standards Technical Panel,
followed by a meeting that includes the UL60950 Industry
Advisory Conference, Canadian Technical Standards Committee
and the Bi-National Working
Andrew -
Please clarify something for me. Is the utility
distribution star configured (WYE connected), rather than
DELTA? Or are you speaking only wrt typical distribution
within a building? (In the US, distribution is generally
used to reference utility power distribution, for instance,
Brian -
From what I can glean from your message, the equipment is
Class 1, but the secondaries do not rely on earthing for
SELV reliability (hence, the Reinforced Insulation EST
value). However, there appears to be some functional
earthing of secondary circuits or there would be no problems
for
Doug -
I was in no way implying the flaw was yours. The flaw lies
in the practical implementation of the system.
Peter
-Original Message-
From: Massey, Doug C. [mailto:masse...@ems-t.com]
Sent: Thursday, March 21, 2002 10:40 AM
Peter - I humbly submit that there is no 'flaw'
in
All -
The only flaw with this is that, based on my previous
discussions with CDRH folks, they have very few auditors and
no budget to hire more (this was a few years ago).
Therefore, by their admission, the primary methods of
keeping manufacturers and importers honest is
1) trust in the
Peter -
Browse to
http://www.csa-international.org/certmarks/
At the bottom of the page is a notation to contact CSA
customer service for artwork and a link to contact
information.
Regards,
Peter L. Tarver, PE
Product Safety Manager
Sanmina-SCI Homologation Services
Jeffery -
I have no answer to the enforcement question for the US, but
I suspect it's complaint and incident driven, as the EMC
regulations historically have been.
For NRTLs, the acceptance of previously certified Class I
lasers incorporated into other equipment is based on CDRH
Laser Notice
David and Gary -
Gary has the name correct, but the difference in rating is
derived due to complications related to the test method.
VTM materials tend to curl up, wilt or shrink away from a
flame when cut into test blanks normally used for the V-x
small scale material testing. To overcome
All -
ANSI standards are not free, but some may be purchased in
soft copy form and those standards are downloadable.
If IEC60825-1 requirements are used for a product, you must
review CDRH Laser Notice 50 to see how you are effected.
This can't be a markings only type of thing; you have to
use
Mark -
My first inclination is to ask: do you need Class I? In the
US, the higher classes of laser products primarily require
labeling and additional information in instruction manuals.
As stated by Doug McKean, 21CFR allows the fiber optic
system connections to provide a level of safety, in
Mark John -
Since 21CFR is based on ANSI Z136.1, it seems the best of
references. However, 21CFR is the ultimate judge for the
US.
ANSI Z136.2 is for fiber optic systems, rather than
products, but is still a good reference.
Regards,
Peter L. Tarver, PE
Product Safety Manager
Sanmina-SCI
George -
Please keep in mind that SELV alone, while addressing
electric shock, does not address risks of fire. If,
however, the external power supply complies with the
requirements of a Limited Power Source, then you're home
free, in terms of complying with the safety standard(s) (the
enclosure
The scenario you describe is specifically addressed by the
standard, IEC60825-1.
Regards,
Peter L. Tarver, PE
Product Safety Manager
Sanmina-SCI Homologation Services
San Jose, CA
peter.tar...@sanmina-sci.com
-Original Message-
From: Collins, Jeffrey
Sent: Friday, June 28, 2002
I don't have a copy, but if we were to refer to ISO
31-0:1992, I'm certain answers to these questions would be
revealed.
Abstract from the ISO web site:
Gives general information about principles concerning
physical quantities, equations, quantity and unit symbols,
and coherent unit systems,
All -
From UL's NWGQ Standardized Appendix Pages (these are for
ITE products)
2.1.2.2If the output of the test-equipment transformer is
less than 500 volt-amperes, the equipment shall include a
voltmeter in the output circuit to indicate the test
potential directly.
It's impossible to
Mike -
See below.
Regards,
Peter L. Tarver, PE
Product Safety Manager
Sanmina-SCI Homologation Services
San Jose, CA
peter.tar...@sanmina-sci.com
-Original Message-
From: Davis, Mike
Sent: Wednesday, June 19, 2002 6:59 AM
1.Are manufacturers required by the FDA to
to that site out of curiosity and it told me that to use the site to
look at its content, I had to allow setting cookies in my browser (I have my
browser to not allow third-party site cookies, but otherwise they're
allowed).
Must be Canadian humor.☺
Peter Tarver
This email message
There is occasionally much haranguing regarding how standards should be
free.
The NFPA has joined ASHRAE and
ASTMhttp://www.nfpa.org/newsandpublications/nfpa-journal/2013/september-october-2013/pov/first-word?order_src=C247to
claim otherwise.
Regards,
Peter L. Tarver
This email
not be
the contracted company's responsibility to take action beyond this minimal
level, unless there's a desire to play extra nice until it's time to not
play nice.
If the contracted company's legal dweebs are on the ball, they're most
likely already on these issues.
Regards,
Peter Tarver
For those who don't subscribe to InCompliance magazine or track recalls
through other methods, the below link is related to a US product recall of
a relocateable power tap with surge protection.
http://www.cpsc.gov/en/Recalls/2014/Schneider-Electric-Recalls-APC-Surge-P
rotectors/
Regards,
are immune to being illogical or ridiculous, either by
design or through ignorance or negligence. ☺
Regards,
Peter Tarver
This email message is for the sole use of the intended recipient(s) and may
contain confidential and/or privileged information. If you are not an intended
recipient, you may
their web sites for these devices and get the
flavor of their certifications. Fair warning, many specs. are not
available in English.
Regards,
Peter Tarver
*From:* Brian Ceresney [mailto:bceres...@delta-q.com]
*Sent:* Thursday, November 21, 2013 15:52
*To:* EMC-PSTC@LISTSERV.IEEE.ORG
for branch
circuit protection and are only suitable for supplementary protection
applications, unless it's used as a part of a Listed assembly identified
for use as branch circuit protection.
QVNU2 breakers are not suitable for branch circuit protection.
Regards,
Peter Tarver
This email message
From: Brian Oconnell
Sent: Tuesday, December 03, 2013 12:31
To: EMC-PSTC@LISTSERV.IEEE.ORG
But there are, in fact, listed CBs intended for supp
interrupt protect.
I'm aware of UL Listed supplementary overcurrent protection fuses, but not
CBs. What's the product category?
Peter Tarver
is an ongoing
issue for everyone involved in product safety certifications. You can try
to have a handful of alternates ready when the certification evaluation is
performed and still have this concern because there's always a less
expensive alternative available.
Peter Tarver
This email message
impulse start fans is that that generate
negligible heat when stalled, but this method would remove all doubt.
Peter Tarver
This email message is for the sole use of the intended recipient(s) and may
contain confidential and/or privileged information. If you are not an intended
recipient, you
is a narrower concept?
In undergrad courses I attended, 'network' and 'circuit' were used
interchangeably.
Peter Tarver
This email message is for the sole use of the intended recipient(s) and may
contain confidential and/or privileged information. If you are not an intended
recipient, you may
be derived based on passive -v- active
components, number of nodes, or based on function. Someone will always
have a different opinion.
In the standards world, they are used interchangeably.
Peter Tarver
This email message is for the sole use of the intended recipient(s) and may
contain confidential
of the applicable
standard) would be deemed critical.
Regards,
Peter Tarver
This email message is for the sole use of the intended recipient(s) and may
contain confidential and/or privileged information. If you are not an intended
recipient, you may not review, use, copy, disclose or distribute
switch for inverter
output connections to the grid. Whether or not this switch can operate
a contactor will depend on the jurisdiction involved.
Regards,
Peter Tarver
This email message is for the sole use of the intended recipient(s) and may
contain confidential and/or privileged information
Following the link on the page to a HAR member list shows Greece is
absent.
Does anyone know the back story?
Regards,
Peter Tarver
This email message is for the sole use of the intended recipient(s) and may
contain confidential and/or privileged information. If you are not an intended
Hi.
I'm doing some research and am looking for recommendations for fume hoods
for abnormal condition testing for my lab. I have an opportunity to have
an exhaust to outside air system and am looking for your thoughts on what
has worked well for you in terms of cfm capacity and which
Brian -
I'm looking to control smoke and fumes during component and other abnormal
conditions, as well as UL 94 testing.
Lots of food for thought. Thanks.
Regards,
Peter Tarver
-Original Message-
From: Brian Oconnell [mailto:oconne...@tamuracorp.com]
Sent: Friday, June 20, 2014
Doug –
I’m familiar with those fans. They were used in a PBX system I was
associated with in an alternate universe. Good variable speed control on
them.
I’m not sure I’ll need a spark arrestor, but I appreciate the reference.
Regards,
Peter Tarver
*From:* Douglas Nix [mailto:d
surface. A simple
stainless steel pan could transmit heat and create undesirable secondary
effects.☺ An air gap might fix that, but then I need to come up with a good
support system.
Details, details ...
Regards,
Peter Tarver
-Original Message-
From: Richard Nute [mailto:ri...@ieee.org
IEC 62109-1 considers “PV circuits in general” to be OVCII.
Regards,
Peter Tarver
*From:* McDiarmid, Ralph [mailto:ralph.mcdiar...@schneider-electric.com]
*Sent:* Friday, August 08, 2014 13:57
*To:* EMC-PSTC@LISTSERV.IEEE.ORG
*Subject:* Re: [PSES] question with regard of inverter
My
accepts our
business.
Regards,
Peter Tarver
This email message is for the sole use of the intended recipient(s) and may
contain confidential and/or privileged information. If you are not an intended
recipient, you may not review, use, copy, disclose or distribute this message.
If you received
Anyone know how to contact him? All contact information I have for Steven
is outdated. E-mails bounce and the last telephone number I have for him
is kaput.
Regards,
Peter L. Tarver
This email message is for the sole use of the intended recipient(s) and may
contain confidential and/or
-
From: Peter Tarver [mailto:ptar...@enphaseenergy.com]
Sent: Tuesday, September 23, 2014 3:11 PM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: [PSES] Looking for Steven Holmes, formerly of UL
Anyone know how to contact him? All contact information I
have for Steven is outdated. E-mails bounce
Good morning.
I am reviewing the suitability of serrated head screws in grounding and
bonding applications. I am aware that these screws are good at resisting
vibration, but I've not seen them used for grounding and bonding purposes.
I question this application since, while the serrations
ISO 17025 (General requirements for the competence of testing and
calibration laboratories) has some requirements related to knowing what
you’re doing.
Regards,
Peter Tarver
*From:* Brian Gregory [mailto:brian_greg...@netzero.net]
*Sent:* Wednesday, May 13, 2015 11:30
*To:* EMC-PSTC
UL recently changed a number of URLs and other items, probably as a matter
normal churn. Several bookmarks no longer worked.
This is probably a related thing that they'll work through in time.
Regards,
Peter Tarver
-Original Message-
From: Brian Oconnell
Sent: Friday, May 15, 2015
David -
Thank you.
In one case, the output was after the CDN. In the other, the CDN was not in
the circuit. I will ask for calibration screen captures with and without
the CDN on both cases. This could prove informative.
Regards,
Peter Tarver
-Original Message-
From: Schaefer
Good morning.
I'm wondering if others have experienced cases where different
manufacturers' surge test equipment (ANSI/IEEE C62.41 ring and
combination waves) with nearly identical open-circuit voltage and
short-circuit current calibrations have led to very different results. In
these cases,
potpourri to fit the application.
Regards,
Peter Tarver
*From:* Adam Dixon [mailto:lanterna.viri...@gmail.com]
*Sent:* Thursday, August 20, 2015 13:36
*To:* EMC-PSTC@LISTSERV.IEEE.ORG
*Subject:* Re: [PSES] 208V/30A/3PH NEMA 3R power distribution question
Thanks for the suggestion, Brian. I
. A
specific area cited was "around Boston."
Has anyone heard of or directly experienced this voltage system?
Is it split-phase or was I misinformed and it's from a WYE
connected transformer?
Peter Tarver
ptar..
Ralph –
I’m less familiar with the CEC, but the NEC does not preclude 208/120 V WYE
to a single-family home (residence). It all depends on how much one is
willing to pay the utility for the service and proper provisioning and
system design at the use location.
Peter Tarver
*From
All the best, Doug
doug...@gmail.com
http://www.linkedin.com/in/dougp01
On Wed, Oct 21, 2015 at 8:21 AM, Peter Tarver <ptar...@ieee.org> wrote:
Good morning.
There are oftensmall, legacy grids that you come across or hear
about.
I was recently told that some areas of the Northea
Brian of the nonburrito ilk -
This is usually called 208 V single-phase.
I'm still trying to clarify the specifics of the request.
Peter Tarver
> -Original Message-
> From: Kunde, Brian
> Sent: Wednesday, October 21, 2015 12:34
>
> snip <
>
> I have heard t
We are marking a product with the RCM and have done relevant emissions
testing for the complete product. The intent from the start has been to
leverage the testing and certifications the supplier obtained to reduce
the amount of testing needed for the end product (a "modular approach" in
a global
One hopes, then, that artists will not lick their brushes or hold them in
their mouths, the same way one hopes science academy janitors will not do
the same with their mops and brooms.
Peter Tarver
> -Original Message-
> From: Brian O'Connell
>
> The chemical princi
Howdy, howdy, howdy.
Product incorporates Type 5 component VDRs and is installed in an OVC III
environment via field wiring connections. Evaluation for a CB Scheme
Certificate and Test Report.
In recent dealings with a CBTL, I was told that the VDRs in a product
needed to be Type 2. In
measurement. They will
rarely give the temperature at the location the EUT is placed.
If the EUT is large the environmental chamber needs to be much larger than
the EUT, as indicated by others.
Peter Tarver
-
This message is from the IEEE
s as well and quickens thermal equilibrium. Open
face of the cube toward the benchtop. Especially nice
in drafty or heavily air conditioned areas.
Peter Tarver
-
This message is from the IEEE Product Safety Engineering Society emc-pstc
d
Fine and valuable responses. Thank you.
Can anyone respond to my question?
> Has anyone else encountered this sort of requirement? The CBTL
either
> could not or would not provide a written requirement, so this
smells off.
Peter Tarver
Date sent: Fri, 26 Feb 2016 14
you get copies of
their certification test reports to verify any claims.
Regards,
Peter Tarver
The information contained in this message may be privileged and confidential.
It is intended to be read only by the individual or entity to whom it is
addressed or by their designee. If the reader
9703," is not a consideration. These outlines are for different
product types.
Peter Tarver
From: Brian Gregory [mailto:brian_greg...@netzero.net]
Sent: Wednesday, September 28, 2016 14:33
I'm trying to find out if UL 6703 (connectors for PV systems) is being upgraded
to UL 9703 or the other
Brian -
UL will generally accept a Class 1 air filter. These are evaluated against UL
900.
Otherwise, it depends on the standard for the end product what requirement
apply. I recall 60950-1 accepting HF-1.
Peter Tarver
From: Kunde, Brian [mailto:brian_ku...@lecotc.com]
Sent: Monday
Reminds me of a movie, Them!
From: Ed Price [mailto:edpr...@cox.net]
Sent: Wednesday, September 14, 2016 23:09
Plutonium is probably not a good answer;
The information contained in this message may be privileged and confidential.
It is intended to be read only by the individual or entity to
them guess if the next sound they heard
sound was recorded or live. Folklore to people like me, but gospel to some
audiophiles.
Peter Tarver
> -Original Message-
> From: Ken Javor
> [mailto:ken.ja...@emccompliance.com]
> Sent: Thursday, August 25, 2016 17:32
>
the testing was simplified to a single temperature with the
pass/fail criterion simply being the 2.0 mm diameter dimple, rather than
finding the temperature at which the 2.0 mm dimple forms.
Maybe Pete Perkins or Rich Knute recall further back than I do.
Peter Tarver
From: Carpentier
.
Pretty clever, but outlandishly expensive.
Peter Tarver
> -Original Message-
> From: Ken Javor
> [mailto:ken.ja...@emccompliance.com]
> Sent: Monday, August 22, 2016 19:55
>
> Next, the terms are not entirely gibberish. They may be
> unfamiliar to those not in the hi-fi
measures from 13 June 2016.
Article 50
Repeal
Directive 1999/5/EC is repealed with effect from 13 June 2016.
RED is effective now. Unless I missed something deferring it’s adoption.
Peter Tarver
From: Charlie Blackham [mailto:char...@sulisconsultants.com]
Sent: Wednesday, November 02, 2016 09:00
of competencies relative to several countries'
requirements for grid compliance of distributed generators, we received an
exorbitant quote for UL to research their own capabilities.
I have been less than impressed so far with such claims of aid, so I'm
reluctant to entertain a subscription service.
Peter
It should be kept in mind that all of these so-called services are sales tools.
My experience with all of the agencies discussed have been less than stellar on
the delivery side, once a PO is placed.
Peter Tarver
The information contained in this message may be privileged and confidential
series?
I am aware of 61439-0, but haven't yet purchased that document to discover what
guidance it can give.
Peter Tarver
The information contained in this message may be privileged and confidential.
It is intended to be read only by the individual or entity to whom it is
addressed
of the MD, where the text Doug mentions is located, goes
on to say that they’re, “intended for lifting loads and whose only power source
is directly applied human effort.” This encompasses:
• automotive lifts and jacks
• come-alongs
• block and tackle sets (if sold as a unit)
Peter Tarver
From
is in good condition and went through a calibration verification
in AUG2016.
The currents are within "Measurement range setting Range 1," but the meter is
set in auto range mode. I plan some additional experiments using defined
ranges, rather than auto in the next day or so.
Pe
.
If an rms value is also needed, you can capture the inrush on a scope and gate
the measurement over the relevant number of line cycles.
Regards,
Peter Tarver
From: John Woodgate [mailto:jmw1...@btinternet.com]
Sent: Thursday, August 10, 2017 05:32
Well, no-one has challenged Annex B since
are always
there.
I plan to try an isolation transformer, a la 60950-1 to see if there's a
different response.
I have written to Kikusui and asked them a similar question. I'll report back
Peter Tarver
> -Original Message-
> From: John Woodgate
> Sent: Monday, April 24, 2017 23:30
is always "faulted." I can't use
the faceplate outlet for PCC (Protective Conductor Current) measurements, but I
can for touch current measurements.
Peter Tarver
> -Original Message-
> From: Richard
> Sent: Tuesday, April 25, 2017 10:42
>
> Hello Peter:
>
>
.
For shock hazard (Let Go and Reaction), the scale is OK.
Peter Tarver
> -Original Message-
> From: Pete Perkins
> Sent: Tuesday, April 25, 2017 23:17
>
> Peter,
>
> Altho I have no experience with the Kikusui meter, I
> believe that
> you are on the right trac
This afternoon's update: the resolution of the inductive current probes I have
are limited to 10 Ma. All currents look like noise.
Peter Tarver
> -Original Message-
> From: Peter Tarver
> Sent: Wednesday, April 26, 2017 09:29
>
> Thank you, Pete.
>
> I have receive
d edition (photocopied)
>
> I'll hang onto these for a couple weeks, but they'll be in
> the recycling bin or donated to a library after that.
>
>
> Regards,
>
> Peter Tarver
>
-
This message is from the
sides of
the border of Germany and Austria, rather than Germany as a whole.
Peter Tarver
From: Kannan Dhamodaran [mailto:kan...@india.tejasnetworks.com]
Sent: Monday, August 14, 2017 21:36
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] -60Vdc Telecom supply voltage
Thank you Joe Randolph and Bostjan
Hi, Ralph (say hello to Sarah U also).
UL 1741, Supplement A has this as a requirement in Tables SA8.1 and SA8.2.
Peter Tarver
> -Original Message-
> From: Ralph McDiarmid
> Sent: Wednesday, May 03, 2017 10:59
>
> Has anyone been asked to perform the Unintentional
&g
on
a board has some height, so it’s possible that, under the right circumstances,
Paschen’s could have an effect on Creepages as well as Clearances.
Peter Tarver
From: Vincent Lee
Sent: Tuesday, May 09, 2017 21:00
Hi all,
Good day,
1) May I know what is the scientific relationship between
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