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From: Rich Nute [mailto:ri...@sdd.hp.com]
Sent: Friday, November 30, 2001 6:39 PM
To: j...@jmwa.demon.co.uk
Cc: emc-p...@majordomo.ieee.org
Subject: Re: Mains Cords in the UK and the fuse rating
So, the 2-meter length restriction (0.092 ohms)
appears not to be in consideration of the short
I read in !emc-pstc that Rich Nute wrote (in
<200112010039.qaa15...@epgc196.sdd.hp.com>) about 'Mains Cords in the UK
and the fuse rating', on Fri, 30 Nov 2001:
>So, the 2-meter length restriction (0.092 ohms)
>appears not to be in consideration of the short-
>circuit current. It appears that a
Hi John:
> More significantly, its resistance affects the maximum short-circuit
> current that can flow.
This is a valid consideration with regard to safety.
Given a 6-amp maximum, 0.75 sq mm size, and 2 meters
length.
In North America, 2X rated current is the 1-minute
operating time
I read in !emc-pstc that Rich Nute wrote (in
<200111301943.laa15...@epgc196.sdd.hp.com>) about 'Mains Cords in the UK
and the fuse rating', on Fri, 30 Nov 2001:
>The length of the cord will affect the voltage at
>the load end of the cord.
More significantly, its resistance affects the maximum
> For an IT product there is a restriction in the use of mains cords with a
> cross
> sectional area of 0.75mm2 for units up to 6 amps when the cord is greater
> than
> 2m in length (EN60950: 2000 section 3.2.5)
I am curious as to the hazard that is prevented by
this length require
Almost certainly the answer will be found in BS1363 Part 1,
Specification for rewirable and non-rewirable 13A fused plugs.
(I assume you are referring to UK plugs, as I don't know of
any other plug with a fuse).
My copy of BS1363 is rather old, but there is a table which shows
a 3A (5A) fuse use
I recommend that you get copies of BS 1362 and all parts of BS 1363 from
BSI. You may also want to get a copy of EN 60799.
Regards,
+=+
|Ronald R. Wellman|Voice : 408-345-8229 |
|Agilent Technologies
I read in !emc-pstc that Chris Allen wrote
(in <80256b13.004f5079...@notesmta.eur.3com.com>) about 'Mains Cords in
the UK and the fuse rating', on Thu, 29 Nov 2001:
>For an IT product there is a restriction in the use of mains cords with a cross
>sectional area of 0.75mm2 for units up to 6 amps w
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