Hi MIke:
IEC 320, Figure 1, specifies acceptable appliance couplers for
Class II products:
INLET CORD CONNECTOR RATING
----- -------------- ------
C2 C1 0.2 A
C8 C7 2.5 A
C10 C9 6 A
C19 C17 10 A
C24 C23 16 A
Not all of these may be commonly available in the USA. However,
I would suggest Panel Components Corp. as a possible source for
non-USA power components.
C2/C1 is commonly used on shavers.
C8/C7 is commonly used on portable electronics.
I've not seen the others in use on products.
Best regards,
Rich
> From [email protected] Mon Apr 21 22:30:55 PDT 1997
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> Message-Id: <[email protected]>
> From: "Mike Elliott" <[email protected]>
> To: "Rich Nute" <[email protected]>
> Cc: <[email protected]>
> Subject: Re: IEC320 and Double insulation
> Date: Mon, 21 Apr 1997 22:30:25 -0700
> X-Msmail-Priority: Normal
> X-Priority: 3
> X-Mailer: Microsoft Internet Mail 4.70.1160
>
> Hi Rich,
>
> If I use Class II construction throughout my equipment and wish to
> apply the box-within-a-box double-insulated symbol to it, what type of
> power plug cord can I use? My handy-dandy Newark catalog shows only
> 3-conductor IEC-320-C13 terminated cordsets. Should I be seeking
> IEC-320-C17 types?
>
> --
> Mike Elliott
> Elliott ASE / Counterpoint
> fax: + 760 945 0219
> [email protected]
> http://www.counter-point.com/cpoint
> http://www.elliottase.com/audio
>
> ----------
> > From: Rich Nute <[email protected]>
> > To: [email protected]
> > Cc: [email protected]
> > Subject: Re: IEC320 and Double insulation
> > Date: Monday, 21 April, 1997 12:18 PM
> >
> >
> >
> >
> > Hi Hans:
> >
> >
> > The IEC 950/EN 60950 definition for a Class I product is:
> >
> > "Equipment where protection against electric shock is achieved
> > by:
> >
> > a) using BASIC INSULATION, and also
> >
> > b) providing a means for connecting to the protective earthing
> > conductor in the building wiring those conductive parts that
> > are otherwise capable of assuming HAZARDOUS VOLTAGES if the
> > BASIC INSULATION fails.
> >
> > Notes
> >
> > 1 CLASS I EQUIPMENT may have parts with DOUBLE INSULATION or
> > REINFORCED INSULATION, or parts operating in SELV CIRCUITS.
> >
> > 2 For equipment intended for use with a power supply cord, this
> > provision includes a protective conductor as a part of the
> cord."
> >
> > Your product DOES use basic insulation.
> >
> > Your product IS provided with a means for connecting to the
> protective
> > earthing conductor in the building wiring. (The fact that the
> terminal
> > is not at the supply end of the cord is irrelevant.)
> >
> > The construction you describe is IMPLIED to be Class I by use of the
> > two-wire plus ground IEC 320 connector.
> >
> > I believe there is a requirement either in IEC 950 or IEC 536 that if
> a
> > protective grounding terminal is provided, the equipment is
> considered
> > Class I even if it is Class II construction throughout.
> >
> > You cannot apply the double-insulated symbol to a product with a
> > grounding terminal.
> >
> >
> > Best regards,
> > Rich
> >
> >
> > ps: The power cord plug is NOT Class 0. Class 0 is a product with
> only
> > Basic Insulation and for use only in an earth-free insulating
> > environment which provides protection against electric shock in
> the
> > event of a fault in Basic Insulation.
> >
> > At one time, the Euro authorities believed the normal indoor
> > environment to be an earth-free insulating environment, which
> then
> > qualified two-wire, basic-insulated products for use in such an
> > environment.
> >
> > Some years ago, Class 0 construction was deemed unacceptable in
> > Europe (although it appears to be acceptable in Japan).
> >
> >
> >
> >
>
