Raymond
I think you have asked a very big question - and unfortunately I do not
have time to go into it!
However, I also think that it has been discussed before in EMC-PSTC, and so
I suggest that you ask Ed Price or Rich Nute if they can identify the
previous threads for you to examine on the RCIC website.
Additionally, I would recommend that you try the Interpower Components
website (www.interpower.com) and request a copy of their "Export Designers
Reference and Catalogue 9".
Page 16 thereof gives a brief resume of the need for fusing in UK BS1363
plugs.
You could also review BS 7671"Requirements for Electrical Installations" -
otherwise known as the "IEE Wiring Regulations" (which I believe you may
use in Hong Kong) and its associated Guidebooks.
Regards
John Allen
----------
From: raymond...@dixonsasia.com.hk[SMTP:raymond...@dixonsasia.com.hk]
Sent: 17 November 1999 15:20
To: John Allen
Cc: emc-p...@ieee.org
Subject: RE: internet information
John,
I am very insterested in your explaination on fused plug requirement
between the ring main supply system and branch or spur systems. Could you
please shed more light on to me about the fused plug requirement on the
ring main supply and a simply way to identify the said main supplies.
Thanks and regards,
Raymond Li
===================================================
John Allen <john.al...@rdel.co.uk> on 17/11/99 04:41:13 pm
Please respond to John Allen <john.al...@rdel.co.uk>
To: "'emc-p...@ieee.org'" <emc-p...@ieee.org>, "'Laura Leyba-Newton'"
<lnew...@hach.com>
cc: (bcc: Raymond Li/DixonsNotes)
Subject: RE: internet information
Laura
All UK standard power cords require to be fused - regardless of the fusing
in appliance to which they are connected - because we use a totally
different building "ring main" supply system to most other countries which
use "branch" or "spur" systems !
The main reason is that the power cord cross-sectional (0.75 - to 1.5 sq
mm) area is much less than that of the ring main (2.5 to 4 sq mm) , and
fuses have to be inserted wherever such a change occurs.
Fusing in the appliance is to protect the appliance - not the power cord.
Regards
John Allen
Racal
UK
PS: the previous threads are on the RCIC.com website.
----------
From: Laura Leyba-Newton[SMTP:lnew...@hach.com]
Sent: 16 November 1999 18:36
To: 'emc-p...@ieee.org'
Subject: internet information
Could someone please tell me where previous EMC and safety discussions are
posted on the internet.
Also I am interested to know if a detachable UK power Cord is required to
be
fused. Products using this line cord have integral fuses in both AC lines.
You help would be greatly appreciated.
-Laura
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