I have run into an issue with our plug configuration recently in China.
It seems that China now requires the plug blades to have no holes in
them. Referring to the small round opening at the upper area of a US
plug. We have been told by our customer that we only need to get a
letter from the
Barry et al,
Yes - I'm afraid I wasn't very clear about that. I felt that my original
message may
have led people to believe that Annex E F were required (also known as
normative)
by the new EN 55011. In reality they are only useful as optional information or
reference material (also known
Does anyone have any experience with labels that can meet Mil
spec marking permanency. In particular Mil-Std-883E Method 2015.11
Resistance to Solvents. Any help would be greatly appreciated.
Best Regards,
Rob Walch
Chief Engineer
VI-Olathe
rwa...@vectron.com
-
This
From: Millsaps Cindy-G14342 g14...@ga25epd.mot.com
Subject: Plugs for China
Date: Tue, 20 Oct 1998 16:10:33 -0400
To: 'emc-p...@ieee.org' emc-p...@ieee.org
It seems that China now requires the plug blades to have no holes in them.
Referring to the small
Hi John.
You wrote:
It concludes the conclusion of the Working Party remains that there is
still no convincing evidence of health effects in man due to low-level,
low-frequency
electromagnetic fields.
You'll forgive the healthy cynicism of the British Public when they read
statements like that.
ed.pr...@cubic.com writes:
Sorry, Cindy, I'm of no help on your question. But, can anyone tell me
just what those little circular holes in the High and Neutral plug blades
are supposed to do?
Ed
--
Ed Price
ed.pr...@cubic.com
Ed,
Don't really know what for. But can
Hello To All,
Was at the EU web site looking for the text of the Packaging Directive.
Found it and discovered that the Annexes were missing. Sent a feedback to
the site and this is the response I received. The two attached files are
their list of sales agents and electronic gateways to buy
Hello,
We have been asked by one of our dealers if our product complies with
NEN3410 which is a local Dutch regulation.
Can anyone tell me what this regulation is?
Thanks in advance.
Scott
s_doug...@ecrm.com
-
This message is coming from the emc-pstc discussion list.
To cancel your
Conversely, I would be interested in knowing WHY they considered them
unacceptable.
Rick
-Original Message-
From: ed.pr...@cubic.com [mailto:ed.pr...@cubic.com]
Sent: Tuesday, October 20, 1998 6:07 PM
To: EMC-PSTC;
Hello Ed,
The holes in the plug blades are a result of the manufacturing process used to
make the pins. This is referenced in the standard ANSI/NEMA WD 6-1997 on page
17 as a note.
Regards,
Ron Wellman
well...@corp.hp.com
___
Hello Cindy,
The holes in the plug pins have never been allowed for China. If you look at
the Chinese standard for plugs and receptacles (GB 1002-1996) figure 1 shows
the plug without pin holes.
Regards,
Ron Wellman
well...@corp.hp.com
From: ed.pr...@cubic.com
Subject: Re: Plugs for China
Date: Tue, 20 Oct 1998 16:06:42 -0800
To: EMC-PSTC emc-p...@majordomo.ieee.org, Millsaps Cindy-G14342
g14...@ga25epd.mot.com
From: Millsaps Cindy-G14342
Hello,
I'm doing some tests of conducted emission using a LISN. My commercial
voltage level is 220 V, 60Hz. But the product i'm testing is 110 V. So,
i'm using a transformer before the LISN this way:
Mains = Transformer(220/110) = LISN = EUT ( Equipment Under Test )
My questions are:
# am i
Development of international standard takes a time. Modification takes
even longer. CISPR approval criteria are at least 67% in favor and no
more than 25% against votes by participating National Committees.
CISPR Sub-Committee B developed Amendment to CISPR 11 to allow
measurement at a closer
Hello again,
Someone complained that I sent 35 MB worth of disk consuming attachments
along with my e-mail regarding Euro-Lex. In fact, the two attachments were
total 43 Kbytes. Since they were attached to an e-mail I received from
Euro-Lex, there was no URL I could supply. Still, I thought the
I just looked at a hospital-grade cord, and it had solid, nickel-plated blades
_with_ a hole.
Is the hole related to plug retention in the outlet? I thought I remembered
seeing small bumps on the mating blades inside the wall outlet.
On Wed, 21 Oct 1998 08:15:52 -0800, ed.pr...@cubic.com
Muriel:
That circuit is OK. All source impedances upstream of the LISN are undefined.
The source power voltage applied to the lISN can be anything as long as it
doesn't exceed the LISN max voltage rating. The LISN, by definition, produces
the standardized source impedance for the EUT.
Yes,
From: Scott Douglas s_doug...@ecrm.com
Subject: Apology
Date: Wed, 21 Oct 1998 13:44:01 -0400
To: emc-p...@majordomo.ieee.org
Hello again,
Someone complained that I sent 35 MB worth of disk consuming attachments
along with my e-mail regarding Euro-Lex. In
Hello all,
Yes, the holes are for retention, and UL498 specifies the holes must be
chamfered to prevent them from cutting off the mating bumps in the outlet.
The holes are optional, but plugs have to pass retention tests either way.
Mike Harris/Teccom Co. (Product Safety Consulting)
We have employment opportunities available for 2 EMC Technicians and 1
Safety Engineer.
For the Technician positions, we are seeking experienced individuals to
perform EMI and EMC testing to U.S. , European, and other foreign
country standards. They will work under the direction of EMC
Patrick,
You are correct. The small bumps in the contact blades of the wall outlet
are designed to mate with the holes of the
attachment plug blades. My understanding is that holes in the blades and bumps
on the wall outlet contacts are
optional. However, if the holes and bumps are used, the
Moshe:
We treat the 48V input as a secondary voltage with primary voltage
rules. Therefore, you will have to hold to the _reinforced_ distances
for creepage and clearance.
Regards,
John R. Kretsch, P.E.
Compliance Engineering Supervisor
ADC Broadband Communications
john_kret...@adc.com
Dear Moshe,
I assume you mean creepages and clearances between input
circuits and SELV circuits (and not conductors). I am also
assuming you are familiar with the clearance and creepage Tables
in UL1950 and/or EN 60950 which depends on the Installation
Category and Pollution Degree.
In
--- Forwarded Message Follows ---
From: Self Single-user mode
To: emc-p...@ieee.org, t...@world.std.com,
mvald...@netvision.net.il
Subject:Re: isolation of battery (72V max) input from SELV
Circuits
Date sent: Wed, 21
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