Subject: Re: [PSES] Is this common knowledge - Electrical Ratings
Hi Peter:
I believe rating markings, energy efficiency ratings, EMC and Radio
markings should be harmonized worldwide and governments/regulators
should be involved to train consumers the meaning these markings.
As a consumer
McDiarmid | Schneider Electric | Solar Business | CANADA |
Regulatory Compliance Engineering
From:
John Woodgate j...@jmwa.demon.co.uk
To:
EMC-PSTC@LISTSERV.IEEE.ORG
Date:
01/28/2012 01:36 PM
Subject:
Re: [PSES] Is this common knowledge - Electrical Ratings
In message
, 2012 11:50 AM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] Is this common knowledge - Electrical Ratings
But electrical equipment does on occasion get moved and reinstalled, so the
nameplate provides information
which might otherwise be lost. ( as in the all important and rarely read
The radio, emc and rating markings are needed to be harmonized between
countries so manufacturers can minimize the space on their labels. Currently
what most manufacturers do is hire my services to find them the most common
denominator. They then design label skews to meet their marketing
Ha!
The rating markings are for the test house to
determine whether the primary components are
suitably rated!
;-)
-
This message is from the IEEE Product Safety Engineering Society emc-pstc
discussion list.
For consumer grade equipment, one might argue that you could do away with
ratings and assume that if you purchase something from you local retailer
it will work in your home, however, for permanently connected equipment and
for more industrial/commercial equipment, I think the need for electrical
Rich and all
I believe rating markings, energy efficiency ratings, EMC and Radio markings
should be harmonized worldwide and governments/regulators should be involved to
train consumers the meaning these markings. There is no reason why one country
requires the ratings to be in traditional
Hi Peter:
I believe rating markings, energy efficiency ratings, EMC and
Radio markings should be harmonized worldwide and
governments/regulators should be involved to train consumers
the meaning these markings.
As a consumer, why do I need to know the meaning
of EMC and Radio markings?
In message CC6671B76F2D411A89EA3618F932A0C1@RichardHPdv6, dated Sat,
28 Jan 2012, Richard Nute ri...@ieee.org writes:
The ratings could just as well be in the accompanying documents.
... which are thrown away, no, sorry, *recycled*, with the packaging.
--
OOO - Own Opinions Only. Try
The ratings could just as well be in the accompanying documents.
... which are thrown away, no, sorry, *recycled*, with the packaging.
Of course. But, as I said before, why do I
need to know the ratings? Especially after
the equipment is installed?
Most manufacturers now provide e-copies
In message 7BAE23D8F53F4BC1AA15CD43A55E162B@RichardHPdv6, dated Sat,
28 Jan 2012, Richard Nute ri...@ieee.org writes:
Of course. But, as I said before, why do I need to know the ratings?
Especially after the equipment is installed?
I agree entirely. Let's take the requirement out of
The issue is that you said most, not all.
John Shinn
-Original Message-
From: Richard Nute
Sent: Saturday, January 28, 2012 1:23 PM
To: 'John Woodgate' ; EMC-PSTC@LISTSERV.IEEE.ORG
Subject: RE: [PSES] Is this common knowledge - Electrical Ratings
The ratings could just as well
Date: Sat, 28 Jan 2012 18:17:37
To: EMC-PSTC@LISTSERV.IEEE.ORG
Reply-To: John Shinn jmsh...@pacbell.net
Subject: Re: [PSES] Is this common knowledge - Electrical Ratings
The issue is that you said most, not all.
John Shinn
-Original Message-
From: Richard Nute
Sent: Saturday
Happy Friday everyone
I am asking a question that I already know the answer to, but I am
trying to determine if it is common knowledge or if it was something
that I picked up along the way and have always accepted as being true.
If you were to see a product with a marked electrical rating of
Hi Kevin,
The 120-240V product is auto-ranging and can use either voltage with no special
action required. The 120/240V product will have a voltage selector switch. I do
believe this is common knowledge, at least among product safety engineers. ;)
Scott Aldous
Compliance Engineer
AE Solar
] Is this common knowledge - Electrical Ratings
Happy Friday everyone
I am asking a question that I already know the answer to, but I am
trying to determine if it is common knowledge or if it was something
that I picked up along the way and have always accepted as being true.
If you were to see a product
It's probably common knowledge on THIS forum that 120-240V indicates an
autoranging power supply and 120/240V indicates there is a switch setting for
one or the other. I'll bet the average consumer has no idea, though.
Jim Hulbert
-Original Message-
From: emc-p...@ieee.org
Fully agree with Jim!
John Allen
London, UK
On 27 January 2012 15:39, Jim Hulbert jim.hulb...@pb.com wrote:
It's probably common knowledge on THIS forum that 120-240V indicates an
autoranging power supply and 120/240V indicates there is a switch setting
for one or the other. I'll bet the
Is it likely that the average consumer even reads the reg. label for ratings?
Kaz Gawrzyjal
From: emc-p...@ieee.org [mailto:emc-p...@ieee.org] On Behalf Of allen john
Sent: Friday, January 27, 2012 9:56 AM
To: Jim Hulbert
Cc: emc-pstc
Subject: Re: Is this common knowledge - Electrical Ratings
I'll go farther and suggest that the average consumer doesn't even know the
label is there.
Ghery S. Pettit
From: emc-p...@ieee.org [mailto:emc-p...@ieee.org] On Behalf Of
kazimier_gawrzy...@dell.com
Sent: Friday, January 27, 2012 7:57 AM
To: john_e_al...@blueyonder.co.uk; jim.hulb...@pb.com
Perhaps these days are long past, but there was a time when some switching
power supplies were designed as 120/240 supplies without a mechanical
switch. They used two energy-storage capacitors in series. At low line
voltage, the input rectifier diodes were configured (electronically) as
[mailto:don_borow...@selinc.com]
Sent: Friday, January 27, 2012 8:13 AM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] Is this common knowledge - Electrical Ratings
Perhaps these days are long past, but there was a time when some switching
power supplies were designed as 120/240 supplies without
27, 2012 8:40 AM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] Is this common knowledge - Electrical Ratings
It's probably common knowledge on THIS forum that 120-240V indicates an
autoranging power supply and 120/240V indicates there is a switch setting for
one or the other. I'll bet
to is a hair
dryer during international travel after blowing up the first one!
Dan
-Original Message-
From: John Cotman [mailto:john.cot...@conformance.co.uk]
Sent: Friday, January 27, 2012 10:35 AM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] Is this common knowledge - Electrical
Thanks everyone for your response. Everyone who responded to me on
the forum and privately was correct that 120-240V indicates a range,
and the product can operate at any voltage over that range. 120/240V
indicates that the product can only operate at those specific voltages
(plus tolerances).
Cannot believe that fellow power suppliers did not jump on this.
My employer has a active and popular model series of component power
supplies rated 120/240V. Only time that we dived into the lower-end market.
Very simple and reliable thyristor-controlled auto-switch, with very small
dead-zone.
Kevin,
Note also that here in the US, in Canada, and other countries with power
systems similar to that of the United States, nominally 120 V to ground, 60
Hz, residential single phase, 3-wire power is identified as a 120/240 V ac,
single phase, 3-wire system. This consists of the two live
to is a hair
dryer during international travel after blowing up the first one!
Dan
-Original Message-
From: John Cotman [mailto:john.cot...@conformance.co.uk]
Sent: Friday, January 27, 2012 10:35 AM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] Is this common knowledge - Electrical
...@dialogic.com
Date: 01/27/2012 09:58 AM
Subject:Re: [PSES] Is this common knowledge - Electrical Ratings
Sent by:emc-p...@ieee.org
Dans experience reminded me of a guy who bought a 120 V
coffee maker as a present for someone in (old) England.
Having some knowledge of AC
Maytum m.j.may...@ieee.org
To: EMC-PSTC@LISTSERV.IEEE.ORG
Cc: Dan Roman dan.ro...@dialogic.com
Date: 01/27/2012 09:58 AM
Subject: Re: [PSES] Is this common knowledge - Electrical Ratings
Sent by: emc-p...@ieee.org
Dans experience reminded me of a guy who bought a 120 V
In message 4f22e536.60...@ieee.org, dated Fri, 27 Jan 2012, Mick
Maytum m.j.may...@ieee.org writes:
Dans experience reminded me of a guy who bought a 120 V coffee maker as
a present for someone in (old) England. Having some knowledge of AC
supplies he bought a 240 V to 120 V travel adaptor so
...@jmwa.demon.co.uk
To: EMC-PSTC@LISTSERV.IEEE.ORG
Date: 01/27/2012 10:45 AM
Subject:Re: [PSES] Is this common knowledge - Electrical Ratings
Sent by:emc-p...@ieee.org
In message 4f22e536.60...@ieee.org, dated Fri, 27 Jan 2012, Mick
Maytum m.j.may...@ieee.org writes:
Dans
In message
of237cb435.ac0c42c8-on88257992.0067506c-88257992.0068c...@selinc.com,
dated Fri, 27 Jan 2012, don_borow...@selinc.com writes:
In the mid-1930 in the USA, there were some radios designed with 3-wire
power cords -- two copper conductors and a third resistive conductor.
This was
My nifty Samsung TV is rated 100-240, 50/60 Hz.
Per the discussion here:
100-240 indicates a continuous range;
50/60 Hz implies two discrete switchable ranges.
As mentioned in this discussion, 50/60 implies a
range of frequencies between 50 and 60 where the
TV would not operate. Of
, Gary'; don_borow...@selinc.com;
EMC-PSTC@LISTSERV.IEEE.ORG
Subject: RE: [PSES] Is this common knowledge - Electrical Ratings
My nifty Samsung TV is rated 100-240, 50/60 Hz.
Per the discussion here:
100-240 indicates a continuous range;
50/60 Hz implies two discrete switchable ranges
...@alcatel-lucent.com
To:
EMC-PSTC@LISTSERV.IEEE.ORG
Date:
01/27/2012 09:24 AM
Subject:
Re: [PSES] Is this common knowledge - Electrical Ratings
Kevin,
Note also that here in the US, in Canada, and other countries with power
systems similar to that of the United States, nominally 120 V to ground,
60
In message EF296E6C3C5548BFB0F6C34B8313B6BB@RichardHPdv6, dated Fri,
27 Jan 2012, Richard Nute ri...@ieee.org writes:
120 V, 50/60 Hz certified by UL and CSA.
220-240 V, 50/60 Hz certified with CE and others.
The ratings are distinctly separate, but on the
same label. No switch. Its
Basis for rating info on label of consumer product based on regional
electric code and marking requirement in scoped safety
standard. Basis for
rating on a component is to verify comformity. Note the rationale in
60950-1: Equipment shall be provided with a power rating marking, the
...@ieee.org]
Sent: Friday, January 27, 2012 4:13 PM
To: oconne...@tamuracorp.com; EMC-PSTC@LISTSERV.IEEE.ORG
Subject: RE: [PSES] Is this common knowledge - Electrical Ratings
Basis for rating info on label of consumer product based on regional
electric code and marking requirement in scoped
...@ieee.org
Sent: Friday, January 27, 2012 8:32 PM
Subject: RE: [PSES] Is this common knowledge - Electrical Ratings
The cord-set rating is determined by the equipment's rating. The cord-set
rating cannot be used to determine power requirements. The plug on the
cord-set will limit the user
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