CE marked isn't all of the answer, though. If somebody is CE marking a
connector, they must have issued a Declaration of Conformity, and that
declaration must cite specific standards - it would be interesting to see
the D of C for this particular connector type.
For what application? would also
After pulling this out of a piece of equipment, I have serious doubts about the
long term use of wire nuts.
http://s139.photobucket.com/albums/q296/user/?action=viewcurrent=2012-10-08185745.jpg
David Schaefer
Senior EMC Engineer
TÜV SÜD America Inc
Office: 651 638 0251
Cell: 612 578 6038
David
Probably not Listed and/or not properly crimped with the proper tools and/or
not suitable for the number of wires or wire gauge sizes.
Best Regards
Sent from my iPhone
Peter S. Merguerian
pe...@goglobalcompliance.com
Go Global Compliance Inc.
www.goglobalcompliance.com
(408) 931-3303
John,
Thanks for your detail explanation. If the substances of RoHS and REACH can
be exchanged, why we need two requirements.
Regards,
Scott
On 7/10/12 8:59 PM, John Allen john_e_al...@blueyonder.co.uk wrote:
Scott
RoHS is strictly about the substances which the manufacturer must limit
REACH is about knowing what substances are in your premises,
How much , and control how they stored. (and packed and labeled)
In certain cases notification is required.
REACH is not only for materials incorporated into the end product
but also for those used to in the process.
(for example
Thought I knew what I was doing, obviously I don't
I have a device with a thermal resistance ThetaJA (J-P in this documentation).
It's for SMT CHIP LED the specified value is 400C/W. for a plastic package that
seems about right. I am looking at another LED but it lists ThetaJA as
400K/W.
The latest edition of IEC 61000-3-12:2011 (power line harmonics for input
currents 16A) has an interpretation sheet that references IEC 61000-3-2:2011
(harmonic for input currents 16A).
I cannot find any evidence that IEC 61000-3-2:2011 exists. The latest version
for sale appears to be IEC
I know of IEC 61000-3-2:2005-11, 3rd edition. Is it possibly a typo?
Doug
Douglas E Powell
Independent Compliance Consultant
970-646-3732
http://www.linkedin.com/in/dougp01
http://www.linkedin.com/in/dougp01
-Original Message-
From: Knighten, Jim L jim.knigh...@teradata.com
Date:
Gary-
First principle: Heat flows from hot to cold, just like water runs down
hill. You need to use a pump (a heat pump for heat, or a water pump for
water) to make it flow up hill. Just as it takes energy input (into a
pump) to make water flow up hill, it also takes energy input to make heat
Hi Gary,
Theta JA is a differential, not an absolute temperature. Many manufacturers use
Kelvin when describing temperature differentials and Celsius when describing
actual temperatures. However, for Theta JA, it doesn't matter whether the
vendor talks about Kelvin or Celsius; they are only
Hello Gary,
In this relationship 1 K/W equals 1 C/W.
As one example, see http://www.diffen.com/difference/Celsius_vs_Kelvin
Br.
Helge Knudsen
Denmark
From: emc-p...@ieee.org [mailto:emc-p...@ieee.org] On Behalf Of McInturff,
Gary
Sent: 9. oktober 2012 22:29
To:
There is a JIS C 61000-3-2:2011 listed as an approved NVLAP test standard.
And I have a VDE-issued EN61000-3-2:2011-06, based on
IEC61000-3-2:2005+A1:2008+A2:2009+BugsBunny
Probably a typo. But one never knows what lurks in the shadows of EMC
standards.
Brian
-Original Message-
From:
Hi All,
I'm faced with helping a friend work through an OSHA finding that requires the
fitting of light curtains on several machines in a metal fab shop. Several of
these machines were never designed to have light curtains, but OSHA wants them.
So... Can anyone point me to resources
Hi Jim:
According to the IEC web site, IEC 61000-3-2, Edition 3.2, dated 2009-04,
is the current edition.
This document is indicated as
61000-3-2 IEC:2005+A1:2008+A2:2009
which means the base document is the 2005 edition and includes 2008
and 2009 amendments.
In my experience with IEC
K or C are (almost) identical, just the starting point is different: C
starts @ 0 (freezing temperature for distilled water at sea level
pressure, i.e., 1 atmosphere), and defines 100 as boiling of same
conditions.
K is the same as C, but is off-set by 273 (i.e., 0 K is -273 C, so 100
C is 373 K).
From the photo, I believe we see two wire nuts, the plastic cases of
which have fused together. One wire nut connects the two black
(live) wires, and one wire nut connects the two white (neutral) wires.
(Note the smoke deposits on the white wires.)
A yellow wire nut is rated for minimum 2 #18 up
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this. Instead follow the directions below.
Scott Douglas, EMC-PSTC Email List Admin
---
Manager, Product Engineering Compliance
Westminster, CO
HID Global is
All,
Thank you for all this input to the wire nut question recast.
Although it seems these devices have gained some acceptance, I don't see any
outright endorsements.
I have used these myself and I am very aware of their shortcomings. There are
reasons wire splicing is not allowed in
Naftali is correct in that Kelvin is an extension of °C, only offset so that
0 Kelvin is at
absolute zero, or -273.15 °C. When referring to a Delta-T, the number is
the same
whether in Kelvin or °C. Be aware that the specs noted are Delta-T/Watt,
not actual temperatures.
Also, Theta JS is
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