: What is killer joules?
PM
In message web-153134...@california.com, dated Sat, 18 Aug 2007,
Robert A. Macy m...@california.com writes:
Thanks to all who answered this question.
The culmination of information:
350mJ is safe
20J is lethal
I find your conclusions questionable and I would advise great caution.
It was
Thanks to all who answered this question.
The culmination of information:
350mJ is safe
20J is lethal
For interest:
In AIR, the maximum voltage a metal ball can hold relates
to the curvature of the ball. The maximum energy a ball
can store is related to the maximum voltage and its charge
Regards
Tim
6239
Hi All,
Take a look at section 6.3 of EN 61010 .
There it defines the stored energy risk as less than 350mJ or 45uC, the
break point being 15kV.
I presume that, even at 15kV, 350mJ is insufficient to maintain a
current for long enough to cause serious harm. Similar with 45uC.
In message 801191.97999...@web39601.mail.mud.yahoo.com, dated Tue, 14
Aug 2007, Bill Owsley wdows...@yahoo.com writes:
There seems to be many more references to contact or shock, than to
fire, but maybe that's just in this 60950 version.
The editions don't differ that much.
Or maybe with a
There seems to be many more references to contact or shock, than to fire, but
maybe that's just in this 60950 version.
Or maybe with a comprehensive reading of the standard, it becomes apparent
that the implication is for fire primarily, and not so much the explicit
stated contact or accessable or
In message 476571.21348...@web39611.mail.mud.yahoo.com, dated Mon, 13
Aug 2007, Bill Owsley wdows...@yahoo.com writes:
This is what I was thinking of, from 60950-2000.
1.2.8.8 HAZARDOUS ENERGY LEVEL: A stored energy level of 20 J or more,
or an available
continuous power level of 240 VA or
This is what I was thinking of, from 60950-2000.
1.2.8.8 HAZARDOUS ENERGY LEVEL: A stored energy level of 20 J or more, or an
available
continuous power level of 240 VA or more, at a potential of 2 V or more.
John Woodgate j...@jmwa.demon.co.uk wrote:
In message
PSNet,
Thanx to John Woodgate for his additional remarks on sensation and
current. Yes, the current is the key parameter - designers would really
like voltage limits but the conditions need to be controlled to provide
proper protection.
From a historical point of view the traditional
In message
201048ea81ba0745aca78e4cc8839001c8b...@desmdswms201.des.grplnk.net,
dated Mon, 13 Aug 2007, Haynes, Tim (SELEX) (UK Capability Green)
tim.hay...@selex-sas.com writes:
BS EN 50191 (erection and operation of electrical test equipment) has
the following definition of safe electrical
Dear All,
BS EN 50191 (erection and operation of electrical test equipment) has
the following definition of safe electrical energy...
For frequencies below 500Hz...
25Va.c. or 50Vd.c. AND is SELV or PELV
If the voltage exceeds that above, it is still a safe voltage if the
current through a
In message 497805.15292...@web39612.mail.mud.yahoo.com, dated Sun, 12
Aug 2007, Bill Owsley wdows...@yahoo.com writes:
Is there also a hazardous energy limit? something like 240 VA?
No, there is no fixed value. The body is sensitive to current, and
different parts are differently sensitive.
Is there also a hazardous energy limit? something like 240 VA?
Richard Nute ri...@ieee.org wrote:
Hi Bill:
How about 12 VDC?? Have you ever leaned against a chrome car bumper on a hot
summers day when sweaty and wearing shorts and tried to disconnect the
positive terminal of a car
Hi Bill:
How about 12 VDC?? Have you ever leaned against a chrome car bumper on a hot
summers day when sweaty and wearing shorts and tried to disconnect the
positive terminal of a car battery? I found the sensation noticable.
We're talking about energy causing an abbreviated
life span.
Robert et al,
You have received quite a bit of good information already from the
folks here on the PSNet. I'll try to, hopefully, add something new here.
The research on electric shock effects has been ongoing since the
development of electricity for commercial purposes. The basic
In message 683371.2674...@web39604.mail.mud.yahoo.com, dated Fri, 10
Aug 2007, Bill Owsley wdows...@yahoo.com writes:
How about 12 VDC?? Have you ever leaned against a chrome car bumper on
a hot summers day when sweaty and wearing shorts and tried to
disconnect the positive terminal of a car
But is that 350 joules in a 1400 uF cap charged to 500 V or a 3.5 F cap
charged to 10 V? I don't think the 10 V solution would have any useful
effect.
--
How about 12 VDC?? Have you ever leaned against a chrome car bumper on a hot
summers day when sweaty and wearing shorts and tried to
Hi Robert:
What is the amount of energy that kills a person?
There is no single answer to this question.
First, continuous current through the heart can
cause fibrillation and, if not corrected, death
due to lack of blood circulation. The value of
the continuous current depends on the
[mailto:emc-p...@ieee.org] On Behalf Of Bill Owsley
Sent: Friday, August 10, 2007 1:21 PM
To: Robert A. Macy; emc-p...@ieee.org
Subject: Re: What is killer joules?
Defibrillators dump energy as shocks rated at a max of 360 joules into the
human. This stops the fibrillation of the heart by stopping
In message 252800.4603...@web39601.mail.mud.yahoo.com, dated Fri, 10
Aug 2007, Bill Owsley wdows...@yahoo.com writes:
Defibrillators dump energy as shocks rated at a max of 360 joules into
the human. This stops the fibrillation of the heart by stopping the
heart effectively 'killing' you, but
Defibrillators dump energy as shocks rated at a max of 360 joules into the
human. This stops the fibrillation of the heart by stopping the heart
effectively 'killing' you, but the hope is that you don't stay that way. The
heart will re-generate its electrical activity if there has not been a lot
In message web-151977...@california.com, dated Fri, 10 Aug 2007,
Robert A. Macy m...@california.com writes:
For example, maximum leakage in Medical Electronics for direct
connection to patients is around 10uA
Yes, because the current may have a low-impedance path to a vital organ,
Of Robert A.
Macy
Sent: Friday, August 10, 2007 8:51 AM
To: emc-p...@ieee.org
Subject: What is killer joules?
What is the amount of energy that kills a person?
This may seem like mixing terms here, but:
[If these limits are in error, please correct...]
For example, maximum leakage
What is the amount of energy that kills a person?
This may seem like mixing terms here, but:
[If these limits are in error, please correct...]
For example, maximum leakage in Medical Electronics for
direct connection to patients is around 10uA
Maximum leakage for AC mains RFI/EMI filters is
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