Re: [PSES] Japanese manis leads

2018-12-07 Thread John Woodgate

Yes, it helps. Arigato.

Best wishes
John Woodgate OOO-Own Opinions Only
J M Woodgate and Associates www.woodjohn.uk
Rayleigh, Essex UK

On 2018-12-07 22:50, John Allen wrote:

Tom

Thanks,  and so not what I had thought - however, that does clarify the
situation and hopefully has answered John W's question.

John E Allen
West London, UK

-Original Message-
From: T.Sato [mailto:vef00...@nifty.com]
Sent: 07 December 2018 22:35
To: john_e_al...@blueyonder.co.uk
Cc: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] Japanese manis leads

John,

On Fri, 7 Dec 2018 14:40:26 -,
   "John Allen"  wrote:


Ref those 200V products: are they single phase 2-wire (Neutral + Live) +
Ground, OR split-phase (100V on each of 2 Live legs) + Neutral return?
(IIRC, it is the latter - probably introduced as a result of North

American

influence where that configuration is common for high consumption
appliances).

200 V rated products and 200 V outlets usually use 2-wires (L + L) + PE,
although 200 V distributions have 3-wires (L + N + L) + PE so that both
200 V and 100 V equipment can be powered.

Regards,
Tom



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Re: [PSES] Japanese manis leads

2018-12-07 Thread John Allen
Tom

Thanks,  and so not what I had thought - however, that does clarify the
situation and hopefully has answered John W's question.

John E Allen
West London, UK

-Original Message-
From: T.Sato [mailto:vef00...@nifty.com] 
Sent: 07 December 2018 22:35
To: john_e_al...@blueyonder.co.uk
Cc: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] Japanese manis leads

John,

On Fri, 7 Dec 2018 14:40:26 -,
  "John Allen"  wrote:

> Ref those 200V products: are they single phase 2-wire (Neutral + Live) +
> Ground, OR split-phase (100V on each of 2 Live legs) + Neutral return?
> (IIRC, it is the latter - probably introduced as a result of North
American
> influence where that configuration is common for high consumption
> appliances).

200 V rated products and 200 V outlets usually use 2-wires (L + L) + PE,
although 200 V distributions have 3-wires (L + N + L) + PE so that both
200 V and 100 V equipment can be powered.

Regards,
Tom

-- 
Tomonori Sato  
URL: http://t-sato.in.coocan.jp


> -Original Message-
> From: T.Sato [mailto:vef00...@nifty.com] 
> Sent: 07 December 2018 14:04
> To: EMC-PSTC@LISTSERV.IEEE.ORG
> Subject: Re: [PSES] Japanese manis leads
> 
> John,
> 
> On Fri, 7 Dec 2018 10:54:18 +,
>   John Woodgate  wrote:
> 
>> In Japan, are 3-core (L, N, PE) mains leads widely used for
>> single-phase products or are the majority of products safety Class II,
>> with just L and N?
> 
> At least for household products, majority of products are Class 0
> and some specific products such as cloth washers are Class 0I.
> 
> Here in Japan, mains outlets in homes rarely have PE terminals.
> 
> Some products such as air conditioners sometimes rated for 200 V,
> in that case they often have 3-core mains cords.
> 
> Regards,
> Tom
> 
> -- 
> Tomonori Sato  
> URL: http://t-sato.in.coocan.jp
> 
> -
> 
> This message is from the IEEE Product Safety Engineering Society emc-pstc
> discussion list. To post a message to the list, send your e-mail to
> 
> 
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> 
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> well-used formats), large files, etc.
> 
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Re: [PSES] Japanese manis leads

2018-12-07 Thread T.Sato
John,

On Fri, 7 Dec 2018 14:40:26 -,
  "John Allen"  wrote:

> Ref those 200V products: are they single phase 2-wire (Neutral + Live) +
> Ground, OR split-phase (100V on each of 2 Live legs) + Neutral return?
> (IIRC, it is the latter - probably introduced as a result of North American
> influence where that configuration is common for high consumption
> appliances).

200 V rated products and 200 V outlets usually use 2-wires (L + L) + PE,
although 200 V distributions have 3-wires (L + N + L) + PE so that both
200 V and 100 V equipment can be powered.

Regards,
Tom

-- 
Tomonori Sato  
URL: http://t-sato.in.coocan.jp


> -Original Message-
> From: T.Sato [mailto:vef00...@nifty.com] 
> Sent: 07 December 2018 14:04
> To: EMC-PSTC@LISTSERV.IEEE.ORG
> Subject: Re: [PSES] Japanese manis leads
> 
> John,
> 
> On Fri, 7 Dec 2018 10:54:18 +,
>   John Woodgate  wrote:
> 
>> In Japan, are 3-core (L, N, PE) mains leads widely used for
>> single-phase products or are the majority of products safety Class II,
>> with just L and N?
> 
> At least for household products, majority of products are Class 0
> and some specific products such as cloth washers are Class 0I.
> 
> Here in Japan, mains outlets in homes rarely have PE terminals.
> 
> Some products such as air conditioners sometimes rated for 200 V,
> in that case they often have 3-core mains cords.
> 
> Regards,
> Tom
> 
> -- 
> Tomonori Sato  
> URL: http://t-sato.in.coocan.jp
> 
> -
> 
> This message is from the IEEE Product Safety Engineering Society emc-pstc
> discussion list. To post a message to the list, send your e-mail to
> 
> 
> All emc-pstc postings are archived and searchable on the web at:
> http://www.ieee-pses.org/emc-pstc.html
> 
> Attachments are not permitted but the IEEE PSES Online Communities site at
> http://product-compliance.oc.ieee.org/ can be used for graphics (in
> well-used formats), large files, etc.
> 
> Website:  http://www.ieee-pses.org/
> Instructions:  http://www.ieee-pses.org/list.html (including how to
> unsubscribe)
> List rules: http://www.ieee-pses.org/listrules.html
> 
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> Mike Cantwell 
> 
> For policy questions, send mail to:
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> 

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Re: [PSES] Japanese manis leads

2018-12-07 Thread Ted Eckert
Hello John,

The vast majority of single-phase electrical outlets in Japanese residential 
and commercial installations have no protective earth. Most products sold in 
Japan are Class II. Outlets with protective earth are typically only found in 
industrial applications in Japan.

Best regards,
Ted Eckert

The opinions expressed are my own and do not necessarily reflect those of my 
employer.

From: John Woodgate 
Sent: Friday, December 7, 2018 2:54 AM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: [PSES] Japanese manis leads


In Japan, are 3-core (L, N, PE) mains leads widely used for single-phase 
products or are the majority of products safety Class II, with just L and N?

--

Best wishes

John Woodgate OOO-Own Opinions Only

J M Woodgate and Associates 
www.woodjohn.uk

Rayleigh, Essex UK
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Re: [PSES] California Instruments 848TCM-3-599HZ-1

2018-12-07 Thread John Woodgate

I don't know, but I know someone who might, so I'll pass your query on.

Best wishes
John Woodgate OOO-Own Opinions Only
J M Woodgate and Associates www.woodjohn.uk
Rayleigh, Essex UK

On 2018-12-07 14:54, Matthew Wilson wrote:
Hello all, would anyone have, or know of a California Instruments 
848TCM or the schematics for one?  We're trying to find out what IC 
with PCB legend U17 and R21 are on, what we think, is its power supply 
board inside (there are three PCBs in the unit), the one in question 
is "A1 ASSY 4848-705-1".


It looks like this:
https://accusrc.com/uploads/images/img3782.jpg

Please excuse that this is slightly off-topic but thought I'd try a 
long shot with regards the audience here.  It is an old (cira 1983) 
controller for a California Instruments variable AC power supply we 
were hoping to resurrect in order to do an experiment with.


In the unit, unfortunately, U17, an 8 pin IC, and R21 have gone pop in 
a catastrophic way - enough to have 'melted' the ident off the IC.


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[PSES] California Instruments 848TCM-3-599HZ-1

2018-12-07 Thread Matthew Wilson
Hello all, would anyone have, or know of a California Instruments 848TCM or the 
schematics for one?  We're trying to find out what IC with PCB legend U17 and 
R21 are on, what we think, is its power supply board inside (there are three 
PCBs in the unit), the one in question is "A1 ASSY 4848-705-1".

It looks like this:
https://accusrc.com/uploads/images/img3782.jpg

Please excuse that this is slightly off-topic but thought I'd try a long shot 
with regards the audience here.  It is an old (cira 1983) controller for a 
California Instruments variable AC power supply we were hoping to resurrect in 
order to do an experiment with.

In the unit, unfortunately, U17, an 8 pin IC, and R21 have gone pop in a 
catastrophic way - enough to have 'melted' the ident off the IC.

Thanks for reading.








Matthew Wilson
Technical Director


[GBE]
https://gbelectronics.uk


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Re: [PSES] Japanese manis leads

2018-12-07 Thread John Allen
Tom

Ref those 200V products: are they single phase 2-wire (Neutral + Live) +
Ground, OR split-phase (100V on each of 2 Live legs) + Neutral return?
(IIRC, it is the latter - probably introduced as a result of North American
influence where that configuration is common for high consumption
appliances).

John E Allen
W. London, UK

-Original Message-
From: T.Sato [mailto:vef00...@nifty.com] 
Sent: 07 December 2018 14:04
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] Japanese manis leads

John,

On Fri, 7 Dec 2018 10:54:18 +,
  John Woodgate  wrote:

> In Japan, are 3-core (L, N, PE) mains leads widely used for
> single-phase products or are the majority of products safety Class II,
> with just L and N?

At least for household products, majority of products are Class 0
and some specific products such as cloth washers are Class 0I.

Here in Japan, mains outlets in homes rarely have PE terminals.

Some products such as air conditioners sometimes rated for 200 V,
in that case they often have 3-core mains cords.

Regards,
Tom

-- 
Tomonori Sato  
URL: http://t-sato.in.coocan.jp

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Re: [PSES] Japanese manis leads

2018-12-07 Thread John Woodgate

Thank you.

Best wishes
John Woodgate OOO-Own Opinions Only
J M Woodgate and Associates www.woodjohn.uk
Rayleigh, Essex UK

On 2018-12-07 14:04, T.Sato wrote:

John,

On Fri, 7 Dec 2018 10:54:18 +,
   John Woodgate  wrote:


In Japan, are 3-core (L, N, PE) mains leads widely used for
single-phase products or are the majority of products safety Class II,
with just L and N?

At least for household products, majority of products are Class 0
and some specific products such as cloth washers are Class 0I.

Here in Japan, mains outlets in homes rarely have PE terminals.

Some products such as air conditioners sometimes rated for 200 V,
in that case they often have 3-core mains cords.

Regards,
Tom



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Re: [PSES] Japanese manis leads

2018-12-07 Thread John Woodgate

Thank you.

Best wishes
John Woodgate OOO-Own Opinions Only
J M Woodgate and Associates www.woodjohn.uk
Rayleigh, Essex UK

On 2018-12-07 14:04, T.Sato wrote:

John,

On Fri, 7 Dec 2018 10:54:18 +,
   John Woodgate  wrote:


In Japan, are 3-core (L, N, PE) mains leads widely used for
single-phase products or are the majority of products safety Class II,
with just L and N?

At least for household products, majority of products are Class 0
and some specific products such as cloth washers are Class 0I.

Here in Japan, mains outlets in homes rarely have PE terminals.

Some products such as air conditioners sometimes rated for 200 V,
in that case they often have 3-core mains cords.

Regards,
Tom



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Re: [PSES] Japanese manis leads

2018-12-07 Thread T.Sato
John,

On Fri, 7 Dec 2018 10:54:18 +,
  John Woodgate  wrote:

> In Japan, are 3-core (L, N, PE) mains leads widely used for
> single-phase products or are the majority of products safety Class II,
> with just L and N?

At least for household products, majority of products are Class 0
and some specific products such as cloth washers are Class 0I.

Here in Japan, mains outlets in homes rarely have PE terminals.

Some products such as air conditioners sometimes rated for 200 V,
in that case they often have 3-core mains cords.

Regards,
Tom

-- 
Tomonori Sato  
URL: http://t-sato.in.coocan.jp

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[PSES] Japanese manis leads

2018-12-07 Thread John Woodgate
In Japan, are 3-core (L, N, PE) mains leads widely used for single-phase 
products or are the majority of products safety Class II, with just L and N?


--
Best wishes
John Woodgate OOO-Own Opinions Only
J M Woodgate and Associates www.woodjohn.uk
Rayleigh, Essex UK


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