Re: [PSES] NFPA 407 Label use in Canada

[Brian O'Connell]

Dunno, as Canada supposedly uses the GHS, so the diamond would probably have 
the Hazcom 2012 requirements, and not the NFPA/OSHA numbers. FWIW, the severity 
rating numbers are reversed for NFPA701 vs HazCom2012, and there are numerous 
additional pictograms for GHS.

A while back, OSHA added GHS stuff to the MSDS requirements, but not aware of 
any DoT requirements for the pictograms.  Klingon hazardous chemicals marks all 
directly translate to 'drink all of this'.

Brian


From: Doug Powell [mailto:doug...@gmail.com] 
Sent: Thursday, June 22, 2017 3:29 PM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: [PSES] NFPA 407 Label use in Canada

Hi all,

I was wondering, does anyone have experience with using the NFPA 704 chemical 
diamond in Canada and in Canadian French?

I realize NFPA for U.S.A. concerns and possibly there is a Canadian equivalent.

Thanks,  Doug


-- 

Douglas E Powell

doug...@gmail.com

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Re: [PSES] NFPA 407 Label use in Canada

[Doug Powell]

Thanks Brian

I have seen the individual pictograms from Canada, was hoping for a ess
complicated layout.

It is my understanding that OSHA has officially terminated the MSDS in
favor of the SDS as prescribed by the GHS system.  US workplace placards
are supposed to be converted by June 1st, 2016.  Although my experience
with this has been similar to the long standing "metrication" efforts going
back to the 1970s. I'm going to have to come up with another saying for
MSDS vs SDS like the one I use for the SI system: "We should go metric,
every inch of the way!"

best, Doug

BTW, I am currently re-running TNG and DS9 chronologically and I could not
believe it ... Worf told his grown son from the future (a.k.a. K'mtar), "*I
love you*".  And I thought there were no platonic phrases such as this, '*ej
yIlIjQo': reH qamuSHa*'.







On Thu, Jun 22, 2017 at 5:28 PM, Brian O'Connell 
wrote:

> Dunno, as Canada supposedly uses the GHS, so the diamond would probably
> have the Hazcom 2012 requirements, and not the NFPA/OSHA numbers. FWIW, the
> severity rating numbers are reversed for NFPA701 vs HazCom2012, and there
> are numerous additional pictograms for GHS.
>
> A while back, OSHA added GHS stuff to the MSDS requirements, but not aware
> of any DoT requirements for the pictograms.  Klingon hazardous chemicals
> marks all directly translate to 'drink all of this'.
>
> Brian
>
>
> From: Doug Powell [mailto:doug...@gmail.com]
> Sent: Thursday, June 22, 2017 3:29 PM
> To: EMC-PSTC@LISTSERV.IEEE.ORG
> Subject: [PSES] NFPA 407 Label use in Canada
>
> Hi all,
>
> I was wondering, does anyone have experience with using the NFPA 704
> chemical diamond in Canada and in Canadian French?
>
> I realize NFPA for U.S.A. concerns and possibly there is a Canadian
> equivalent.
>
> Thanks,  Doug
>
>
> --
>
> Douglas E Powell
>
> doug...@gmail.com
>



-- 

Douglas E Powell

doug...@gmail.com
http://www.linkedin.com/in/dougp01

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[PSES] NFPA 407 Label use in Canada

[Doug Powell]

Hi all,

I was wondering, does anyone have experience with using the NFPA 704
chemical diamond in Canada and in Canadian French?

I realize NFPA for U.S.A. concerns and possibly there is a Canadian
equivalent.

Thanks,  Doug


-- 

Douglas E Powell

doug...@gmail.com
http://www.linkedin.com/in/dougp01

-

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Re: [PSES] USB dongle connector shield filtered grounding

[John Woodgate]

You will find a lot of good, proven information about shield grounding for
balanced interconnects in the Journal of the Audio Engineering Society
Volume 43 Number 6  1995 June. Don't be put off by the 'audio'; the
techniques are valid up to 100 MHz or even higher.
 
Put simply, the cable shield should be regarded as a pipe connecting two
water tanks. So connect so that it doesn't leak! Furthermore, connect the
shell to the outside of a conducting enclosure, because connecting to the
inside turns the cable shield into a transmitting antenna potentially
filling the enclosure with VHF/UHF fog.
 
Now the question changes to 'how to connect a conducting enclosure to the
circuit ground?' Unless the enclosure isn't conducting, of course, In that
case, connect the shell-shield-shell chain to circuit ground at the sending
end,  so that the cable capacitance is charged from a low-impedance source.
 
But that is a very brief summary. The paper by Neil Muncy explains all that
and more, and it all works.
 
 
With best wishes DESIGN IT IN! OOO - Own Opinions Only
  www.jmwa.demon.co.uk J M Woodgate and
Associates Rayleigh England
 
Sylvae in aeternum manent.
 
From: Grasso, Charles [mailto:charles.gra...@dish.com] 
Sent: 22 June 2017 17:52
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: [PSES] USB dongle connector shield filtered grounding
 
Greetings 
 
And just when you thought it was safe to go back in the water..!!
 
Q: Has this august forum heard of/seen/used a filter combo technique
to tie the connector shield to the circuit ground successfully?
 
# ILLUMINATION # ###
My question has to do with USB dongles and the connection of the 
cable shield to circuit ground. I am running across a lot of posts
recommending NOT having a low impedance connection from the
shield to the circuit ground at the dongle connector : rather 
the shield is kept separate (at least AC wise) from the circuit
ground using a ferrite/cap or resistor/cap combo.  
 
I have also read that the industry convention now is to tie the shield
ground
and the circuit ground at the host only and "float" the peripheral connector
using the filter combo previously stated.
 
I have not used this EMI suppression technique but I find it simultaneously
intriguing and
counter intuitive.
 
Q: Has this august forum heard of/seen/used this technique successfully?
 
 
TL/DR: Found new USB grounding technique, am suspicious of it, asking for 
the forums help.
 
TIA 
* ** *

Summary of techniques can be found here:
 
[https://forum.allaboutcircuits.com/threads/usb-device-cable-shield-connecti
on-grounding-it-or-not.58811/]
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[PSES] USB dongle connector shield filtered grounding

[Grasso, Charles]

Greetings

And just when you thought it was safe to go back in the water..!!

Q: Has this august forum heard of/seen/used a filter combo technique
to tie the connector shield to the circuit ground successfully?

# ILLUMINATION # ###
My question has to do with USB dongles and the connection of the
cable shield to circuit ground. I am running across a lot of posts
recommending NOT having a low impedance connection from the
shield to the circuit ground at the dongle connector : rather
the shield is kept separate (at least AC wise) from the circuit
ground using a ferrite/cap or resistor/cap combo.

I have also read that the industry convention now is to tie the shield ground
and the circuit ground at the host only and "float" the peripheral connector
using the filter combo previously stated.

I have not used this EMI suppression technique but I find it simultaneously 
intriguing and
counter intuitive.

Q: Has this august forum heard of/seen/used this technique successfully?


TL/DR: Found new USB grounding technique, am suspicious of it, asking for
the forums help.

TIA
* ** *

Summary of techniques can be found here:

[https://forum.allaboutcircuits.com/threads/usb-device-cable-shield-connection-grounding-it-or-not.58811/]

-

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