I think the FCC would say- Yes!!
However - with component level tests you would
not be. OK - Before you all jump all over me..
Yes there will be cost added to the components.
After all it is hard to skim every cent out of a
part when you do not know the system it will go in.
However the
Dan,
Without knowing any detail on your product, my vote is to say that all of
the requirements of 60950 that apply to any other power supply would apply
in full to a hot swappable supply. Assuming the supply you're handling is
akin to a bank of rectifiers in a shelf, the shelf would also need
There must be a bleeder resistor (across the X caps) to make the AC input
pins safe to touch once the supply is removed from the cabinet.
If there are exposed voltage or energy hazards with the supply removed,
there must be a restriction such that only trained personnel are instructed
to do
What if the product was split up into 10 separate
boxes and each box was shipped out one at a time?
The bill of lading should show that one box has one
part and another box has another part. So, since the
product has a CE mark on it to begin with, CE mark
both boxes, throw the Cert in both
Do any of my esteemed colleagues know of any specific requirements in 60950
(UL/CSA or EN) relating specifically to hot swappable power supplies? A
search in the PDF version of UL/CSA 60950 reveals nothing specific when
searching for hot, swap, or power supply. A visual search of the TOC
also
There have been requests in the past on this forum for examples of
real world events that were EMC related, as I recall we got a few but not
many examples. In an email with Ralph he mentioned some work and an article
that he had written chronically some of these problems. I asked him for
I believe the I.S.M. bands in Canada but will verify that tomorrow-
Ralph Cameron
- Original Message -
From: Pettit, Ghery
To: 'Bailey, Jeff' ; EMC-PSTC (E-mail)
Sent: Wednesday, June 20, 2001 1:40 PM
Subject: RE: Radio controlled cars (toys)
Just remember that the
If you are so am I. As are a few dozen people I know. The only way to get
an OS other than Windows to run well is to build your own machine.
Steve
-Original Message-
From: Massey, Doug C. [mailto:masse...@ems-t.com]
Sent: Wednesday, June 20, 2001 2:42 PM
To: 'IEEE Forum'
Subject: RE:
ofe3b05737.c4036401-on86256a71.0063f...@mmm.com, rehel...@mmm.com
inimitably wrote:
Good question. Does the shipping packaging/crating even have to have CE
marking or is it only
the equipment, sales packaging, and accompanying documentation?
It only HAS to be on the product at present (unless
Just to further confuscate the issue - I once built my own home PC. I bought
a box, motherboard, CPU, memory, variety of ISA cards, etc.
It worked so well, I built a couple or three more for family and friends,
and sold them to those family and friends at a good price.
I didn't check radiated
Hi all
Thanks a lot for the inputs I got.
It is great to have a group like this you can just ask questions and you get
a lot of answers.
Thanks again.
Lothar
Hi Group,
is there any special frequency range assigned to radio remote control toys?
Are there different classes like
Ed -
First and foremost, there must exist a resonant cavity
formed inside the semiconductor or in combination of the
semiconductor die and its packaging. Then the threshold
current (for population inversion of the lasing medium) must
be exceeded. Only the latter is related to external faults
31891b757c09184bbfec5275f85d5595fd8...@cceexc18.americas.cpqcorp.net,
Lesmeister, Glenn glenn.lesmeis...@compaq.com inimitably wrote:
I'd like the 30A working current to come from a single product using an
IEC309 type plug (no 13A fuses). Is this possible in the UK? Would I have
to run a
B2CC0E0F2C10D511B86600B0D06898420118528F@localhost.pelco1, Mavis,
Robert rma...@pelco.com inimitably wrote:
Hello Group,
This question is in regards to a CE Marked assembly.
The Completed end unit is CE Compliant and Marked. The end unit is
disassembled and shipped in 2
Good question. Does the shipping packaging/crating even have to have CE
marking or is it only
the equipment, sales packaging, and accompanying documentation?
Bob Heller
3M Product Safety, 76-1-01
St. Paul, MN 55107-1208
Tel: 651- 778-6336
Fax: 651-778-6252
Peter: You wrote...
In the US and Canada, general purpose branch circuits
relying exclusively on safety certified branch circuit fuses
(which IEC127 and other miniature and microfuses are not),
respectively, can operate at 100% of the branch circuit
rated current...
I'm either out of date or I
Just remember that the frequencies between 50 and 54 MHz require an amateur
radio license in order to use them. They are not for unlicensed use.
Ghery Pettit
Intel
-Original Message-
From: Bailey, Jeff [mailto:jbai...@mysst.com]
Sent: Wednesday, June 20, 2001 10:18 AM
To: EMC-PSTC
Lothar:
There are also several channels allocated in the 75 MHz, 50 MHz and 27MHz
region.
Jeff
Jeff Bailey
Compliance Engineering
SST - A Division of Woodhead Canada
Phone: (519) 725 5136 ext. 363
Fax: (519) 725 1515
Email: mailto:jbai...@mysst.com mailto:jbai...@mysst.com
Web:
Verizon gives some additional guidance in their NEBS Checklist:
http://www.bellatlantic.cg/wholesale/html/word/nebs_inf2.doc
Best regards,
Dave Lorusso
General Bandwidth, Inc.
Compliance and
Design Verification Manager
(512) 681-5480 - direct
(512) 681-5481 - fax
12303
Let's not carried away. Those radiated emission limits protect broadcast
radio reception, period. As such, your personal electronics are turned off
when aircraft safety requires glitch-free operation of its NAV systems.
Hospitals already prohibit INTENTIONAL electromagnetic transmissions which
Lothar:
I found a couple of links which might help you investigate the matter.
Just for toys, though, found nothing in my brief search regarding
professional equipment. Looks like your customer is 'way beyond the
traditional band... Good luck. Louis.
I'd like the 30A working current to come from a single product using an
IEC309 type plug (no 13A fuses). Is this possible in the UK? Would I have
to run a separate dedicated source to do this?
Regards,
Glenn Lesmeister
Product Regulatory Compliance
Compaq Computer Corp. Tel:
Glad to know that the safety brethren are doing something right! Or is it
because we're concerned about liability and our reputation (anytime anything
goes wrong, the safety guy gets fired!) whereas the FCC merely fines the
officer of the company;-- and even then they've not been doing very
Greetings all,
I just peeked at GR-63 and it appears that a 9-10' height for cabling
trays is normal (Figure 2-4). You are correct that GR-1089 is very
vague on the requirement (something like line of sight??). Due to the
final installation config, I would go with a 9' cable crossbar height
Forwarded for Dan Irish dan.ir...@sun.com
Original Message
Subject: Re: FCC + FCC = FCC?
List-Post: emc-pstc@listserv.ieee.org
Date: Tue, 19 Jun 2001 19:14:03 -0400 (EDT)
From: Dan Irish - Sun BOS Hardware dan.ir...@sun.com
Reply-To: Dan Irish - Sun BOS Hardware
I don't have the answer to Glenn's question, but do have a
comment on Nick's response.
Nick states: The rating of a UL rated fuse is more or less
the current at which it blows. The rating of a fuse to IEC
127 (used throughout Europe) is more or less the working
current of the fuse and the
The discussion about LEDs lasing during a fault condition started me doing
some review about LEDs.
But first, what is the fault condition here? Is this a condition where a
power source or limiting resistor fails, allowing the LED to draw more
current than desired (although not enough to destroy
Hello Group,
This question is in regards to a CE Marked assembly.
The Completed end unit is CE Compliant and Marked. The end unit is
disassembled and shipped in 2 shipping containers into the EU. What are the
CE Marking requirements for the two shipping containers?
Do we place a CE mark on
Lothar:
There are several channels allocated in the 72 MHz region for the USA. I'm
not current on this area, but I believe there are some channels specifically
for model aircraft control (possibly only by the modelers' private
convention).
Ed
Ed Price
ed.pr...@cubic.com
Electromagnetic
of0aaadc76.aa1cf1bf-onc1256a71.00429...@i-data.com, k...@i-data.com
inimitably wrote:
This is in the grey zone of what we normally talk about, but can anybody
tell me if there are any countries which don't allow the use of Halogens in
plastic
I don't think there is any blanket ban on halogens,
I think the answer is that the FCC allows declared
compliant devices to be sold in another unit
WITHOUT testing. This has allowed PCs on the
market with as much as 30dB over Class B limits.
It was my understanding that testing always had to be done for the most
common configurations of
FYI, IEC 60601-1-2: 2ED, EMC for Medical Electrical Equipment requires 3/10
V/m testing to 2.5 GHz!
Best regards,
Jim
-Original Message-
From: owner-emc-p...@majordomo.ieee.org
[mailto:owner-emc-p...@majordomo.ieee.org] On Behalf Of Pettit, Ghery
Sent: Monday, June 18, 2001 11:19
--
From: Andrew Wood
Sent: 20 June 2001 13:44
To: 'Finn, Paul'
Subject: RE: EN50104:1998
Paul,
http://europa.eu.int/comm/enterprise/atex/guide/guide_en.pdf
You might find this interesting reading.
I think that the answer depends on whether the O2
Would any one be able to confirm the need to evaluate apparatus used for the
detection and measurement of oxygen to EN 50104:1998 as part of CE marking?
Your comments will be greatly appreciated.
Paul Finn
Panametrics, Inc
Waltham MA
---
This
Doug,
Have the NRTL call out the rated voltage of the fan only and that it is a
Recognized component. Describing the min. CFM for a fan cooling a chip is
not so important in this application. The CPU is mounted on a min. 94V-1
flame rated board and I asume an abnormal test by the NRTL was
31891b757c09184bbfec5275f85d5595fd8...@cceexc18.americas.cpqcorp.net,
Lesmeister, Glenn glenn.lesmeis...@compaq.com inimitably wrote:
Does anyone know if it is common practice or otherwise required to de-rate
products in Europe to 80% (or some other %) of the rating of the branch
circuit as is
002c01c0f914$4b1344b0$3e3e3...@corp.auspex.com, Doug McKean
dmck...@corp.auspex.com inimitably wrote:
The fan itself is more of an issue of having a baseline with
which to allow alternates to be used. If I can prove by
way of fan company documenation that the fan is x cfm,
then that's the
002501c0f905$794dabe0$3e3e3...@corp.auspex.com, Doug McKean
dmck...@corp.auspex.com inimitably wrote:
1. Have any you ever run into something
like this before?
2. If you have, what did you do about it?
I would say that a safety standard that specifies a cfm rating for a fan
is a
I think the answer is that the FCC allows declared
compliant devices to be sold in another unit
WITHOUT testing. This has allowed PCs on the
market with as much as 30dB over Class B limits.
Why did the FCC put in place a compliance methodology
that guarantees non-compliant products are
John Cronin wrote:
Hi Group
This is a question regarding a plug in PC card that has been stated
as FCC compliant which is inserted in a PC that is also stated to
be FCC compliant and the emissions are found to actually exceed
the FCC limits.
I work with this type of issue all the time.
Talk about ripping the lid off of Pandora's box...
--
From: John Cronin croni...@hotmail.com
To: emc-p...@majordomo.ieee.org
Subject: FCC + FCC = FCC?
List-Post: emc-pstc@listserv.ieee.org
Date: Tue, Jun 19, 2001, 5:24 PM
Hi Group
This is a question regarding a plug in PC card that
Hi Group,
is there any special frequency range assigned to radio remote control toys?
Are there different classes like professional devices to control e.g.
planes or helicopters?
My customer is looking for a frequency range above 300 MHz.
Best Regards
Lothar Schmidt
Technical Manager
Yeah sort of. It involves Laser's and you have seen me whine about
it in the recent past. They feel no need to get UL recognition and UL feels
no need to List the product without verification of eye safety (the vendor
won't send the CDRH report either).
I took the same course
The lack of standardization in CFM test methods makes what you are trying to
do very hard. The lack of correlation due to your real life design, with
its particular vent aperture area and layout, backpressure, components
restricting flow, etc is going to make this even tougher.
You may well
Hello Glenn,
Two things complicate this question. One is specific
to the U.K. In the UK all domestic and very many commercial and
light industrial use a ring main for all socket outlets and therefore we
do not have spurs with ratings. UK plugs have fuses in them because
the protection on the
Rich Nute wrote:
Hi Doug:
The issue for me is: What is the safety requirement
that requires cfm (I presume a minimum cfm)?
The issue is a Hazardous Energy ( 240va).
The power output that feeds the board is above
the limit.
The fan itself is more of an issue of having a baseline
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