Exactly who makes the determination that an approved EN is acceptable for
demonstrating compliance with essential requirements of a directive and will
therefore be published in the OJ?
-
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1) Does an EN or IEC standard exist for flexible steel (bendable)
electrical conduit?
2) It has been reported that the trade sizes in the UK are 16 and 20 mm
with 20 mm being the more common of the two. It has also been reported that
the OD is the same as the trade size. Can someone
The metric table that Anton provided seems to say that trade size ½ inch
is the same as 16 mm. However, the OD of trade size ½ inch is 20.7 mm, but
EN 60950 says the OD of 16 mm conduit is 16 mm. Obviously, something does
not compute. I hope its not me.
-
This message is coming from the
Folks, all of the information on NEMA sizes is moot since the original
question was regarding metric sizes - 16 mm in particular - used in Europe
and most elsewhere in the world. Any information on holes for metric
fittings would be appreciated.
--
From: Bill Lawrence
Dick, good luck in getting a government office to assist you. Since your
equipment is not licensed, you have no legal right to expect freedom from
interference. Generally, the PTTs just don't care about interference with
non-licensed services. Good luck.
--
From: Dick
Perhaps you could use a metal screen behind the window. The screen would act
as the fire enclosure and then the plastic could be rated HB. However, hole
size in the screen could be an issue for viewing as well as complying with
the fire enclosure requirements.
--
From:
I can find nothing in IEC 950 nor EN 60950 that defines the requirements for
an attachment plug for equipment that is not permanently connected. Due to
the silence of the standard, I conclude that an attachment plug is not
required per the standard. Therefore, it appears that the plug wiring
Effective May 2000, all transmitters imported into Canada will be checked
for Certification. The Certification number will be required on the customs
form. A short FAQ sheet is attached and the complete story can be found at
http://strategis.ic.gc.ca/SSG/rz00010e.html
We have been considering adding some type of white, light weight, solid
covering using Velcro or similar techniques so that the covering is
removable. One thought has been ceiling tiles. Any suggestions?
--
From: Lacey,Scott [SMTP:sla...@foxboro.com]
Sent:
I have a [brand name omitted to protect the guilty] hand scanner where the
required wording on the yellow caution label is 4 x 10 mm. I can barely read
it. But under that is a totally illegible FDA statement and FCC statement
that I have to use a magnifier to read! Those two statements occupy
Ah, the limits of the English language. In this case may not does not mean
that it is forbidden. Rather, it is a warning that an outlet including one
that has an earth terminal may in fact not be earthed. That is very common
in Denmark. DEMKO and the other Nordic agencies require a special
Disposition 1009/98 requires that all electrical products under 50V comply
with the requirements of Resolution 92/98 effective 18 August 1999. A
Declaration of Conformity will be required for the first year after which
the second phase (test certificate) of Resolution 92/98 will be effective.
Testing by a certified lab is not mandatory; however, if your test results
are ever reviewed, there is a chance that they could be challenged. We have
performed our own tests on all of our products. Some of our files have been
reviewed and none have been challenged. I would be interested in
You can order the standard at the IEC web site, http://www.iec.ch/
http://www.iec.ch/ .
--
From: Guy Story [SMTP:gst...@iphase.com]
Sent: Friday, September 10, 1999 11:19 AM
To: Emc-Pstc (E-mail)
Subject: CISPR 24
Hello everyone. I
Section 7 of EN50133-1 requires that access control components be marked
with the product type and the manufacturing reference. In other
specifications, I have understood that both of these statements refer to the
model number, but obviously something else is required. Would someone please
The CENELEC web site lists A1:1998 as having a dop of 1999-01-01 yet the
amendment and the amended document is missing from the BSI web site. Was
this amendment actually adopted, delayed or recalled?
-
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To cancel your subscription,
Everything you ever wanted to know about EMC can be found at
http://www.sma.gov.au/ http://www.sma.gov.au/ . Basically, the product
must comply with CISPR 22. In-country testing is not required. A local
representative/importer must apply for authority to apply the C-tick mark.
There are no fees.
Brian, I have to assume that as the manufacturer, your company has taken on
the responsibility of ensuring compliance with the directives, applied the
CE mark and issued the Declaration. Now you want to sell an upgrade to the
equipment. Nothing has changed. You the manufacture are still
My comments are embedded below.
--
From: Muriel Bittencourt de Liz [SMTP:mur...@grucad.ufsc.br]
Sent: Monday, August 02, 1999 2:43 PM
To: Lista de EMC da IEEE
Subject: EMC Safety Standards
Dear Group,
I'm making a study on
Doug, virtually every country in the world has its own regulations. My
recommendation is that you obtain an external modem in each target
country/area. The best source of information would be to contact a large
modem company. Check Compliance Engineering magazine. I have seen some
consultants
Thanks for all the comments. Some have suggested that the screen joints are
not the problem. So I have the following question. Our NSA is too low at 30
MHz and acceptable at 35 MHz. As I published in my table, we all have
identified many issues that can affect NSA. Of those, what can drive the
After completing an exhaustive set of diagnostics, we suspect a problem with
ground screen solder joints near our table. We suspect that many of these
joints were not properly heated and/or that flux was not used. Someone other
than my team finished this portion of the pad before we fired them
-
WOODS, RICHARD wrote:
Reed switches are available with a variety of contact materials
(silver,
gold, platinum) depending upon the voltages and currents used and
the
reliability required. Silver is only recommended for applications
where the
voltage and currents
Reed switches are available with a variety of contact materials (silver,
gold, platinum) depending upon the voltages and currents used and the
reliability required. Silver is only recommended for applications where the
voltage and currents will cut through the oxidation film that forms. For
dry
Thanks to each of you who responded. I have created a table listing possible
contributing factors and recommended diagnostic actions. Comments would be
appreciated.
Contributing Factor Diagnostic Action
Antenna Factors Are antennas calibrated? Calibrated at same lab as last
time? Same
I can think of the following items that must be investigated if an OATS is
not vertically NSA compliant. Can you think of others?
Antennas and Cables
* Antenna factors
* Balance
* Currents on transmit cable
* Cable proximity to antenna
* Dipole length
* Bent
these surface variations be a problem? As I indicated before, the site
passed its tests over the last four years. Any other suggestions.
--
From: WOODS, RICHARD
Sent: Friday, July 16, 1999 5:20 PM
To: 'emc-pstc'
Subject: RE: NSA
We have a 10m site
When a country adopts IEC950, it is sometimes necessary for that country to
introduce national deviations due to local laws or conditions. EN 60950
contains EU deviations from IEC 950.
--
From: Biggs, Daniel (IndSys, GEFanuc, NA)
[SMTP:bigg...@gemischova.ge.com]
the 1.5m
table.
--
From: b...@anritsu.com [SMTP:b...@anritsu.com]
Sent: Friday, July 16, 1999 4:00 PM
To: WOODS,RICHARD; INTERNET[ emc-p...@ieee.org]@anritsu.com
Subject: re: NSA
Richard,
Can you detail your procedure to the conclution
Argh! For the first time in five years, our NSA is out of spec on our 3
meter OATS at 30 MHz. The problem appears to be the turn table. We can move
the equipment off of the table to one side or toward the front and comply,
so it does not appear to be an off site reflection problem. We have
You can find the harmonized standards at
http://europa.eu.int/comm/dg03/directs/dg3b/newapproa/eurstd/harmstds/index.
html
http://europa.eu.int/comm/dg03/directs/dg3b/newapproa/eurstd/harmstds/index
.html
--
From: fwhitfi...@rheintech.com
Every time I read this darn Directive, I find something new or I form a new
opinion. Now I have questions about the transitional period found in Article
18.2.
Member States shall not impede the placing on the market and putting into
service of apparatus which is in accordance with the provisions
I concur with Kevin.
--
From: Kevin Richardson [SMTP:k...@compuserve.com]
Sent: Wednesday, July 14, 1999 4:10 AM
To: Gary McInturff
Cc: 'emc-pstc list server'
Subject: Just safety - nnot telecomunications
Gary,
The
You can buy or rent a Time Domain Reflectometer or you can build one
yourself as follows. Connect a 50 ohm pulse generator and high impedance
scope to one end of the cable and terminate the other end of the cable in 50
ohms. If there is a significant reflection at the far end of the cable as
A good example would be a transformer. The current output can be limited by
the resistance of the winding as well as the mutual inductance between the
windings. Of course, increasing the resistance of the windings to limit the
output may cause temperature problems. But any competent transformer
Try http://www.cpsc.gov/ http://www.cpsc.gov/ for US legal requirements
concerning recall
--
From: Ling, Philip [SMTP:pl...@newport.com]
Sent: Friday, July 09, 1999 12:03 PM
To: emc-p...@majordomo.ieee.org
Subject: Product traceability for
A contact was made with DG III concerning the RTTE Directive. The questions
and the reply are listed below. In reference to his last remark, why is
there now controversy over the definition of placing on the market after
the term was clearly defined by the Commission in two explanatory documents
Here is one person's opinion on the frequency harmonization situation in
Europe. If his understanding is correct, I still don't know what is
necessary and sufficient to create a harmonized frequency band under the
RTTE Directive. Comments?
Confusing, isn't it..
Major inspection problems I have encountered.
Parts and records problems:
* Manufacturer's valid code mark on PCBs not found in the current UL
yellow book. The mark may be new or just hard to find in the book.
* Boxes of harness and cables not marked with appropriate CSA and UL
The RTTE Directive references harmonized frequency bands for radio
equipment. How can one determine if a frequency band has been harmonized for
a particular use? My understanding is that it is necessary and sufficient
for the appropriate ETSI standard to be published in the OJ under the
My company is reviewing our plans for handling safety incidents and product
recalls. I would appreciate it if you could point me to documents that
contain such plans or if you could forward any plans that you may have. The
one plan that I do have is from Managing Product Safety Activities by Paul
When a Directive requires information to be provided to the user, and that
equipment is intended to marketed in every EU and EFTA country, what minimal
set of languages must be used? I can think of the following languages that
are used in these countries. Are there more languages that must be
Is there a web site that lists Draft ENs that are published for public
comment?
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quotes). For help, send mail
I am in basic agreement with Rich. My company makes two types of low voltage
products. One type is permanently installed and one is movable. We always
use a certified Class 2 or Limited Power Source. Normally we do not obtain
certifications for our moveable devices since they are not normally
Martin, I have to say that I don't even know what you mean by FDA emission
guidelines. Please elaborate.
My company has installed electronic business equipment in hundreds of
hospitals and medical facilities and we have never been asked to comply with
FDA emission guidelines. Our equipment
ACGIH (American Conference of Governmental Industrial Hygienists ) has
voluntary limits. You can contact them at (513) 742-2020. Order the TLV
booklet for $22.50.
--
From: Florence Sandy-ESF003
[SMTP:sandy_florence-esf...@email.mot.com]
Sent: Wednesday, June 23,
I'll take an educated guess that the Commission is only listing Generic,
Product, and Family standards which does not include the -4 series.
--
From: Cal Whiteley [SMTP:c...@patton.com]
Sent: Wednesday, June 23, 1999 9:03 AM
To:
Can you recommend a lab in the USA that can perform failure analysis on an
electrolytic capacitor?
-
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quotes).
Various EU Directives require certain information to be placed on the
packaging of a product. However, packaging is not defined. The intent of
the requirements appears to be to provide the consumer with information so
that they can make an informed purchasing decision. Please put on your
lawyer's
-rite.com
-Original Message-
From: WOODS, RICHARD [SMTP:wo...@sensormatic.com]
Sent: Wednesday, June 23, 1999 8:49 AM
To: 'emc-pstc
Compliance or non-compliance with EN61000-3-2 will not affect the safety of
the equipment. This is an economic issue, not a safety issue. The EU
restricted harmonics emissions because it is believed that on a
macro-economic level it will be more cost efficient to limit the generation
of power
Brian, in the EU all pacemakers must comply with the immunity requirements
of EN50061/A1:1995. There are no real requirements in the US.
Pacemakers must not malfunction when a 1V peak to peak sine signal with a
frequency range of 20 Hz-500 Hz is applied to a tissue interface simulation
circuit
Updated for Slovenia and China.
cert.pdf
cert.pdf
Description: Adobe PDF document
There is no legal requirement, but the customer may ask for it.
--
From: Grasso, Charles (Chaz) [SMTP:gra...@louisville.stortek.com]
Sent: Thursday, June 17, 1999 9:58 PM
To: 'EMC Group'
Subject: ITE Equipment installed in hospitals
The RTTE Directive says the LVD will apply with no lower voltage limit;
however, it is not clear to me if internal battery operated equipment with
no recharge connections is subject to the LVD. Article 1 of the LVD seems to
imply that the directive applies only to devices with external power
You can find the safety info at http://www.cbscheme.org/
http://www.cbscheme.org/
--
From: David Gelfand [SMTP:gelf...@memotec.com]
Sent: Wednesday, May 12, 1999 8:01 AM
To: IEEE
Subject: Korea
Hello,
Can somebody
Visit http://www.sma.gov.au/ http://www.sma.gov.au/
--
From: lfresea...@aol.com [SMTP:lfresea...@aol.com]
Sent: Monday, May 10, 1999 2:52 PM
To: emc-p...@majordomo.ieee.org
Subject: Down Under EMC
Hi,
if I want to market a
Cortland, would you please tell us what you learned?
--
From: Cortland Richmond [SMTP:72146@compuserve.com]
Sent: Friday, May 07, 1999 11:21 AM
To: Flinders, Randall; ieee pstc list
Subject: RE: Precompliance Testing
Wish I could be
Thank you to everyone that provided comments. In some cases, the replies
were contradictory, so I had to use my best judgement on the reliability of
the source. It came to my attention that there are more severe requirements
for equipment for domestic use, so I have restricted my chart to business
Please elaborate, as 7 of 9 would say.
--
From: Gorodetsky, Vitaly [SMTP:vgorodet...@canoga.com]
Sent: Wednesday, May 05, 1999 8:22 PM
To: 'Flinders, Randall'; 'Hans Mellberg'; 'emc-pstc'
Subject: RE:
Nick, my understanding of EN60065 is that it is more stringent in its safety
requirements than EN60950 because the equipment is used by the general pubic
rather than employees in a business environment. That is the only reason I
believe it would be applicable. Of course, using an example of a pc
I have compiled all that I know or think I know about worldwide safety and
EMC compliance requirements for ITE in the attached document. Sources for
the information include personal experience, agency and CB Scheme web sites
and previous e-mails from this list group. All of the information is
Before anyone yells at me for the Canadian and US safety marks that I
listed, yes I know that other marks are acceptable other than CSA, cUL and
UL. Consider those to be examples. I will reword and/or add a note.
--
From: WOODS, RICHARD
I found the following web site for MEEI, HUNGARIAN INSTITUTE FOR TESTING AND
CERTIFICATION OF ELECTRICAL EQUIPMENTS.
http://www.omikk.hu/trebag/meei/angol/meeia.htm
http://www.omikk.hu/trebag/meei/angol/meeia.htm .
According to the site, safety certification is mandatory for certain
equipment
My opinion is that EN60950 would apply if the equipment is for business use
only. Otherwise, EN60065 would apply for household use and similar
purposes. However, you should ask a Notified Body for an official opinion.
You did not ask, but EN50130-4 would apply for immunity effective 1/2001. I
...@majordomo.ieee.org
Subject: Re: Characterizing a screen room
On Tue, 27 Apr 1999 14:58:30 -0400, WOODS, RICHARD
wo...@sensormatic.com
wrote:
You cannot perform a characterization that will mean anything. The
room will
have standing waves
You cannot perform a characterization that will mean anything. The room will
have standing waves that will be strongly dependant upon the size and
placement of the unit under test, the placement of the antenna and the
frequency. The best that you can do is perform a pretest to find the
frequencies
Multiply watts by 3.415 to obtain BTU/hour. To compute the input power you
need to multiply the rms voltage, rms current and power factor. Or you can
cheat and use a wattmeter.
--
From: s_doug...@ecrm.com [SMTP:s_doug...@ecrm.com]
Sent: Tuesday, April 27, 1999
For those that requested the WordPerfect file.
COMPSPEC.WP6
--
From: WOODS, RICHARD [SMTP:wo...@sensormatic.com]
Sent: Thursday, April 15, 1999 12:30 PM
To: 'emc-pstc'
Subject: South Africa Requirements
I received the following
I received the following document from SABS. I have translated it from Word
Perfect to Word. Enjoy!
SACOMPSPEC.doc
SACOMPSPEC.doc
Description: MS-Word document
If one has a question on an EU Directive, is there a means for obtaining an
official answer?
-
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with the single line: unsubscribe emc-pstc (without the
quotes). For help,
George, some of our electrical equipment (IEC950) is installed in an air
handling space (so called plenum). Our understanding is that UL has a
special test for smoke emissions so special plastics are required. Because
of that, we decided to use metal enclosures. We have to ensure that there
are no
In the wonderful world of EU Directives (RTTE for example) where
information is required to be on the packaging, is there a distinction
between packaging and shipping container. For example, multiple products
may be shipped to a retailer in a shipping container inside of which is the
product in
When I worked for a major PC manufacturer we started out with conductive
coatings on our laptops. Paint over spray was a problem that we had to
address. Also, the coatings did not always touch at all points due to bowing
of the plastics. We were also concerned with the long term effects of
For those of you who are required by directives or standards to include user
documentation with your equipment, what is the minimal set of official
languages that are required to cover the EU?
If you include the Declaration of Conformity, do you also translate it, or
is it sufficient to enclose a
My company has for years produced products in Puerto Rico and has labeled
our products as made in the USA. A couple of years ago, UK customs decided
in their own wisdom that Puerto Rico is not part of the USA and that our
products must be labeled made in Puerto Rico.
So, to answer your question,
I am trying to determine the maximum noise figure that I can have for my
1-16.5 GHz EMC receiver system which includes the horn, mixer for above 18
GHz, preamp, cable and spectrum analyzer. I know the following:
* Signal level received by the horn
* Gain through the system
*
Richard, there should be only a one time cost, if any, and that involves the
application to use the c-tick mark. Only one application is required for all
of your ITE. That application must be submitted by a person located in
Australia, and that person may be an employee or an empowered
I have several open issues with Article 6.3 of the new RTTE directive that
I would like to discuss with the community.
The article indicates that manufacturers must provide information for the
user on the intended use of the apparatus.
* Question: How in depth does this information need
Help! I am entering a new world of test frequencies; 1-26 GHz. I am seeking
recommendations for suppliers for:
* 30 dB notch filter at 2.45 GHz
* 40 dB high pass filter with a lower cutoff at about 3.5 GHz
* 1-26 GHz preamp
All of this equipment would be mounted on the mast
The original message indicated that the writer thought that this standard is
under the LVD. I cannot find this standard published in the OJ as being
required under the LVD; therefore, I must assume that its use is not a
condition of adding the CE mark. So its use is voluntary unless an agency
EN50130-4, Immunity for alarm systems, requires that signal lines be surge
tested per EN6100-4-5 using the coupler/decoupler network in figure 12 for
balanced signal pairs. The equipment available on the market has a bandpass
rating of 100 kHz, and the standard does not specify the type of
Other than Keytek and Shaftner, does anyone else sell surge
coupler/decouplers for I/O lines per IEC 1000-4-5?
-
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ICNIRP Guidelines: 1997
ENV50166-2:1995
NRPB vol 4 No. 5:1993
VDE0848 Part 2:1984
Draft VDE0848 Part 2:1991
--
From: Jackson, William [SMTP:wjack...@harris.com]
Sent: Thursday, March 25, 1999 1:31 PM
To: 'Emc-Pstc (E-mail)'
Cc: Elvy, Stephen
Compliance with EN61000-3-2, Limits for harmonic current emissions
(equipment input current = 16 A per phase) and EN61000-3-3, Limitation of
voltage fluctuations and flicker in low-voltage supply systems for equipment
with rated current = 16A are required for electrical and electronic
equipment
For digital devices, the emissions limits are the same for Canada as they
are for the USA. Industry Canada is the controlling agency and the
specification for digital devices is ICES-003 Issue 2, Revision 1. I believe
that you can find the document on line. A special statement is required on
the
When testing I/O lines to EN61000-4-5, a coupling/decoupling network is
used. One type of network is specified for unbalanced lines and one for
balanced lines (figs. 10 12). Commercial networks are available for
$10,000 to cover both types of circuits. OUCH! Has anyone successfully built
their
Message-
From: WOODS, RICHARD [SMTP:wo...@sensormatic.com]
Sent: Friday, March 19, 1999 6:27 AM
To: 'emc-pstc'
Subject: Harmonized Standards
The Commissions official viewpoint on the rules for the use of
harmonized
The Commissions official viewpoint on the rules for the use of harmonized
standards can be found at www.newapproach.org http://www.newapproach.org .
Click on Concepts. According to the webmaster, The concepts text
originates from the Commission, however I understand it is currently under
revision
The final text of the directive can be found at
http://www.ispo.cec.be/infosoc/telecompolicy/typeappr/proposed.htm
http://www.ispo.cec.be/infosoc/telecompolicy/typeappr/proposed.htm
--
From: ron_pick...@hypercom.com [SMTP:ron_pick...@hypercom.com]
Sent:
To all of you who market equipment worldwide using AC adapters:
1. Is it true that plug adapters similar to those used by tourist are
not legal in most countries?
2. How many different adapters are required to be stocked to handle the
various requirements for plugs and safety
Ian, IRAM, the safety agency in Argentina will accept test reports based
upon IEC standards from most any laboratory until 18 June 1999. After that
date, you must obtain a Type Certificate from IRAM, and after 18 June 2000,
marking is required. Under an MOU, IRAM will accept UL testing to IEC
the UL Listing Mark if the Argentine deviations have been taken into
consideration during the evaluation (operating voltage and power cord, for
example)
For additional information contact Willie Janisch at janis...@ul.com
mailto:janis...@ul.com .
--
From: WOODS
According to this site, the MRA process is being delayed.
http://www.cix.co.uk/~approval/n2_0199.htm
http://www.cix.co.uk/~approval/n2_0199.htm
--
From: Leafloor, Bob: DSI [SMTP:leafloor@ic.gc.ca]
Sent: Tuesday, March 16, 1999 8:11 AM
To:
My source believes that the Radio and Telecommunications Terminal Equipment
Directive will be published in the OJ in April and will take effect after
one year. What do you hear?
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Jeff, if your rack assembly including the power supply is Listed, then the
inspector has no authority to investigate the components included in that
Listed assembly. On the other hand, if you added a power supply to a Listed
rack, then that power supply must be Listed.
--
That's what I love about this mailing list. I learn something new most every
day. Thanks Tania!
--
From: Grant, Tania (Tania) [SMTP:tgr...@lucent.com]
Sent: Wednesday, March 10, 1999 4:27 PM
To: 'EMC-PSTC - forum'; 'WOODS, RICHARD'
Subject: RE
1. Peter, equipment with the standard NEMA plug is considered to be
Class A..
2. Equipment using the heavy duty Industrial plugs complying with IEC
are considered to be Class B. I have never seen those used inside rack
mounted equipment.
3. If the power supply is UL Listed, then
Per Resolution 92, Argentina was scheduled to require a
Conformity-to-Type Certificate for electronic apparatus effective 18 June,
1999. The problem, of course, was that when the resolution was published
they did not have the infrastructure nor MRAs in place to accomplish this
task. Has
My experience is about 5 years old. At that time, all you had to do was sign
a Saudi supplied declaration form that the equipment complied with a
national (e.g., UL) or international safety standard (IEC or EN).
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