RE: UL60950 vs. IEC 60950

2008-05-08 Thread Glyn Garside
Two other general points, even apart from the deviations made by UL from the
IEC version:
 
1) For EU, you need to meet the EN edition, which may also vary from the IEC
edition.
 
2) Unless you specifically asked, the NRTL that evaluated the product to the
UL standard may have only evaluated the product for operation at 120V 60Hz.
But you may be selling the product for use at 230V 50Hz. Even assuming there
are no component changes (between the model evaluated and the model sold in
EU), you may need to re-evaluate the insulation, overcurrent protection and
spacings.
 
PS: One major deviation that applies to all UL standards is that they require
COMPONENTS to meet applicable UL standards.
Whereas the IEC and EN editions require that components meet the applicable
IEC, EN or HD standards.
 
This can be a huge difference, for example power cords, fuses, etc.

Regards,
Glyn Garside
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RE: UL60950 vs. IEC 60950

2008-05-08 Thread Aldous, Scott
The UL standard will highlight differences from the base (IEC) standard. The
EN standard will also highlight differences from the base (IEC) standard.

 

Another thing you could do is get the latest CB bulletin for OFF from the
IECEE, which will list published national and group differences. You can get a
12 month subscription for about US $100. If the link below works, it gives a
preview as to what the bulletin has in it:

 

http://members.iecee.org/iecee/ieceemem
ers.nsf/vScopebyStdCatOnly?OpenView&SBV=OFF

 

Scott Aldous

Compliance Engineer

Advanced Energy

Tel: 970-407-6872

Fax: 970-407-5872



From: emc-p...@ieee.org [mailto:emc-p...@ieee.org] On Behalf Of Ron Pickard,
RPQ
Sent: Thursday, May 08, 2008 8:06 AM
To: david.cole...@selex-comms.com
Cc: emc-p...@ieee.org
Subject: RE: UL60950 vs. IEC 60950

 

Hi Dave,

 

Technically speaking your subject line should’ve been UL60950-1 vs.
EN60950-1 given your query. Anyway, without going into detail you only have to
look at these standards to see the differences between them and from
IEC60950-1, in particular:

UL60950-1: Preface listing 6 types of deviations and Annexes NAA - NAE

EN60950-1: Annexes ZA - ZC

 

Actually, a CB Scheme investigation against IEC60950-1 addressing all national
deviations should be the basis of acceptance in both the US and the EU.

 

If you would like to discuss this further off-line, please let me know.

 

Best regards,

Ron Pickard
RPQ Consulting
7372 West Luke Avenue
Glendale, AZ 85303
+623.512-3451 tel, +623.848-9033 fax
rpick...@rpqconsulting.com

www.rpqconsulting.com



From: emc-p...@ieee.org [mailto:emc-p...@ieee.org] On Behalf Of
david.cole...@selex-comms.com
Sent: Thursday, May 08, 2008 6:06 AM
To: emc-p...@ieee.org
Subject: UL60950 vs. IEC 60950

 


Sorry if this has been asked before, but can anyone point me to a comparison
of these two standards, highlighting any significant differences? 

Is there any significant reason why compliance with UL60950 cannot be used to
show compliance with the LVD for CE marking? 

Any help appreciated, 

Best Regards,
Dave Coleman AIIRSM
SELEX Communications 

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RE: UL60950 vs. IEC 60950

2008-05-08 Thread Ron Pickard, RPQ
Hi Dave,

 

Technically speaking your subject line should’ve been UL60950-1 vs.
EN60950-1 given your query. Anyway, without going into detail you only have to
look at these standards to see the differences between them and from
IEC60950-1, in particular:

UL60950-1: Preface listing 6 types of deviations and Annexes NAA - NAE

EN60950-1: Annexes ZA - ZC

 

Actually, a CB Scheme investigation against IEC60950-1 addressing all national
deviations should be the basis of acceptance in both the US and the EU.

 

If you would like to discuss this further off-line, please let me know.

 

Best regards,

Ron Pickard
RPQ Consulting
7372 West Luke Avenue
Glendale, AZ 85303
+623.512-3451 tel, +623.848-9033 fax
rpick...@rpqconsulting.com

www.rpqconsulting.com



From: emc-p...@ieee.org [mailto:emc-p...@ieee.org] On Behalf Of
david.cole...@selex-comms.com
Sent: Thursday, May 08, 2008 6:06 AM
To: emc-p...@ieee.org
Subject: UL60950 vs. IEC 60950

 


Sorry if this has been asked before, but can anyone point me to a comparison
of these two standards, highlighting any significant differences? 

Is there any significant reason why compliance with UL60950 cannot be used to
show compliance with the LVD for CE marking? 

Any help appreciated, 

Best Regards,
Dave Coleman AIIRSM
SELEX Communications 

This email and any attached files contains company confidential information
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In addition the sender excludes all liabilities (whether tortious or common
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SELEX Communications Limited is a Private Limited Company registered in
England and Wales under Company Number 964533 and whose Registered Office is
Marconi House, New Street, CHELMSFORD, Essex. CM1 1PL. England.
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RE: UL60950 vs. IEC 60950

2008-05-08 Thread Barker, Neil
David
 
Unfortunately, I do not know of any comparison. However, the first reason why
you cannot use UL60950 for compliance with the LVD is that it is not an EN
standard, and also incorporates the US National Deviations, so is different in
some areas from the EN version. That said, if you demonstrate compliance to
IEC 60950-1 with ALL national deviations included, then you should be
compliant with both UL60950-1 and EN60950-1, but you may still need the
independent test reports citing those standards to be able to prove this to
regulatory authorities. This is not too difficult to achieve, just placing a
few additional requirements on some of the components and materials that you
use.
 
Best regards 

Neil R. Barker CEng MIET HonFSEE MIEEE 
Manager 
Quality Engineering 
e2v technologies (uk) ltd 
106 Waterhouse Lane 
Chelmsford 
Essex CM1 2QU 
UK 

Tel: (+44) 1245 453616 
Fax: (+44) 1245 453571 
Mob: (+44) 7801 723735 

P Please consider the environment before printing this email. 

-Original Message-
From: david.cole...@selex-comms.com 
[mailto:david.cole...@selex-comms.com]
Sent: 08 May 2008 14:06
To: emc-p...@ieee.org
Subject: UL60950 vs. IEC 60950



Sorry if this has been asked before, but can anyone point me to a 
comparison
of these two standards, highlighting any significant differences? 

Is there any significant reason why compliance with UL60950 cannot be 
used to
show compliance with the LVD for CE marking? 

Any help appreciated, 

Best Regards,
Dave Coleman AIIRSM
SELEX Communications 

This email and any attached files contains company confidential 
information
which may be legally privileged. It is intended only for the person(s) or
entity to which it is addressed and solely for the purposes set forth therein.
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In addition the sender excludes all liabilities (whether tortious or 
common
law) for damage or breach arising or related to this email including but not
limited to viruses and libel.
SELEX Communications Limited is a Private Limited Company registered in
England and Wales under Company Number 964533 and whose Registered Office is
Marconi House, New Street, CHELMSFORD, Essex. CM1 1PL. England.
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RE: UL60950 vs. IEC 60950

2008-05-08 Thread Tarver, Peter
For the -1, 2nd ed, see

http://www.ul.com/hitech/ite/60950-1_2ndEd_Analysis_Nov14_07.pdf


I might have some comparison documents archived for older editions that I'll 
look for on request.


Regards,

Peter L. Tarver, PE
ptar...@ieee.org 

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