The requirement is defined in the following:
EN60730-1 clause 7.2.1, table 7. item 17 (L, N & earth symbol required)
EN60950 clause 1.7.7.1 (earth symbol); 1.7.7.2 (N)
EN61010-1 - no requirement (as far as I can see at a quick glance)
EN61558-1 - clause 8.6 (N and earth symbol)
EN60204-1 - C
Some standards (for example IEC 65 based) require that if the mains cord is
intended to be replaceable than the connection must be accessible (using tools)
and the terminals marked. "L" for the line terminal, "N" for the neutral
terminal and the ground symbol for the earthing terminal.
John Rad
Josiah,
Clause 1.7.7.2 of EN 60950 is titled "Terminals for external primary power
supply conductors" and states the following:
"For permanently connected equipment and equipment with ordinary
non-detachable power supply cords:"
"- terminals intended exclusively for connection of the p
Joe, the Directives will not state these kinds of things. You need to look
at the particular standard and see what is says. In general, Markings such
as L and N are only required for devices that are not cord connected. Cord
connected devices do not require such markings
Please respond to bur.
Joe
My comments:
The "N" appears in many IEC/EN standards under the "Markings" clauses for
terminals EXCLUSIVELY intended for connection of the neutral conductor of
the supply - but I believe that it is generally only necessary in most
countries for equipment for connection to 2 or more phase
For ITE, refer to IEC60950, 3rd ed, Subclause 1.7.7.2, first dashed
paragraph.
Regards,
Peter L. Tarver, PE
Homologation Engineering
Nortel Networks
ptar...@nortelnetworks.com
-Original Message-
From: bur...@andovercontrols.com [mailto:bur...@andovercontrols.com]
Sent: Wednesday, June 1
Hi Paul,
Testing to the Generic Standard EN 50082-1:1997
For surges EN 61000-4-5 AC power ports you only need criteria B
Temporary degradation or loss of function of performance, which is
self-recoverable.
Regards
Edward O'Toole
Intertek Testing Services
-Original Message-
From: plaw...@w
Hi Joe:
> Does anyone know the clause or statement that
> identifies "L" for Line voltage and "N" for
> Neutral A.C. mains marking in the LVD or any
> EU standard published?
Clearly, L and N are abbreviations.
There is confusion whether L means "live" or "line."
N, in this con
1) In some cases, additional EMI filters added between the AC input of the
system and the power supply can cause the surge waveform to ring higher, causing
the power supply to fail.
In one case, I was doing Common-Mode surge testing on a system that had extra
EMI filters. The surge voltage that t
Hello members !
I'm looking for users of the HP spectrum analiser EM 8590EM 1 to change
some informations, as software used and how to introduce new standards
on memory cards.
I hoppe someone can help !
Best regards
--
Prof. Hari Bruno Mohr
Departamento de Engenharia Eletrica
Universidade Feder
Reference EN60950.
1.7.7.1 - marking of protective earth terminals
1,7.7.2 - marking of "N" on terminals intended exclusively for connection
to neutral, and marking of three-phase conductors if incorrect phasing will
cause a hazard
There is no reference to marking "L" on anything.
Richard Woo
I have an 8591EM, and have done some programming. What did you need help with?
On Wed, 14 Jun 2000 10:25 AM -0700, Hari Mohr wrote:
>I'm looking for users of the HP spectrum analiser EM 8590EM 1 to change
>some informations, as software used and how to introduce new standards
>on memory cards.
AMERICAN POWER CONVERSION, the leading manufacturer of UPS’s and
various surge protection products located Billerica, MA, is seeking a
Product
Safety Test Technician. Duties to include: product safety testing of UPS
products to UL,CSA
VDE, and various IEC standards. Solid electronic testing a
Hi Group,
Does anyone know the clause or statement that identifies "L" for Line voltage
and "N" for Neutral A.C. mains marking in the LVD or any EU standard published?
I need to provide proof for our engineering team.
Thank you in advance for your help.
Joe
Josiah P.Burch
Compliance Engin
There is a error in the telephone number from the previous message. It has
been corrected.
AMERICAN POWER CONVERSION, the leading manufacturer of UPS’s and
various surge protection products located Billerica, MA, is seeking a
Senior Product
Safety Engineer. Duties to include: product safety t
Air conditioning appliances do not appear on my (1995) copy of the
prescribed list of appliances for Western Australia.
Can anyone confirm (or deny) that they do not require approval for
sale in WA or any other part of Australia?
Thanks, and regards
Nick.
Marvin,
Your generator would be an excellent, handy tool to
periodically verify radiated test site integrity up to 10 GHz.
Is there a chance to make it commercially available?
Mirko Matejic
---
This message is from the IEEE EMC Society Product Safety
forwarding...
Reply Separator
Subject:EMC 2001: Call for Papers
Author: Benoit Nadeau
List-Post: emc-pstc@listserv.ieee.org
Date: 6/14/00 9:38 AM
Bonjour de Montréal,
In a very recent decision, the Board of Directors of the IEEE EMC Society
deci
forwarding...
Reply Separator
Subject:HP 8590 Analiser
Author: Hari Mohr
List-Post: emc-pstc@listserv.ieee.org
Date: 6/14/00 10:25 AM
Hello members !
I'm looking for users of the HP spectrum analiser EM 8590EM 1 to change
some informations, a
Group,
Does anyone have any information on NAVSEA OP4 and how it may relate to ITE
equipment? Any help is appreciated.
Sam Wismer
RF Approvals Engineer
LXE, Inc.
(770) 447-4224 Ext. 3654
Visit Our Website at:
http://www.lxe.com
---
This message is f
As requested, here are the plots of the 1- 10 GHz source I made. Two of the
plots are the results of scans made at 3 m. The other 3 plots are of the
unit fed directly into a spectrum analyzer which programmatically sampled
the output levels over time. The sampling interval was about every 4
minu
> What I and others have seen is that the Common Mode Choke and Y caps will
> act
> as a voltage doubler during a common mode surge.
> I would see a 2X voltage doubling during the surge event.
> I believe the surge builds up a voltage on the Y caps and a big field on
the
> CMC.
> When the surge t
Eval boards must comply with FCC requirements. Legally this does not
mean they must meet Class A/B emissions levels.
It is your call whether to meet Class A/B or mark the evaluation
boards with the disclaimer of Section 2.803, see (e)(1)(v) under
paragraph 2.803.
Hi,
Thank you for your previous comments regarding Evaluation Boards.
Could I raise one issue for further comment.
It has been stated that Evaluation Boards must comply with FCC emc
requirements CFR 47 Part 15.
Another view is that Evaluation Cards are exempt as defined by section
15.103 (c)
Sometimes I have seen another reason for the problem of reset caused by surge
transients.
Inside the power supply is a feed-back signal for control of the output
voltages and this signal has to pass a galvanic barrier. An optocoupler with a
bad common mode rejection may have been used and ther
Hello members !
I'm looking for articles covering radiated emission aspects on circuits
operating on 10GHz, placed in a plastic enclosure with metallic coating
.
Any suggestions ?
Best regards
Amund Westin
Det Norske Veritas
* amund.wes...@dnv.com
*
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