In message <54e90ce3.9030...@bendbroadband.com>, dated Sat, 21 Feb 2015,
Richard Nute <ri...@bendbroadband.com> writes:
No-one will try to write a standard for a product that does not yet
exist, so standards development must always lag innovation.
The question I ask is: Can you make a safe product without a safety
standard?
Yes. 'Safe' products (perhaps not by the current criteria) preceded, for
example, BS 415 (an ancestor of IEC/EN 60065), which originally applied
to 'battery eliminators' (mains power packs for battery radios, 120 V DC
at about 60 mA).
If the principles of product safety are known, they can be applied to
an innovative product technology as well as existing product
technology.
No safety standard is required.
Agreed. The EU system allows that.
The three-block model can tell when safeguards are required. For most
products, both a basic safeguard and a supplementary safeguard provide
sufficient safety. Such safeguards provide protection under normal
conditions and under single fault (e.g., failure of the basic
safeguard)
conditions.
Agreed.
Such is engineering and science driven safety, not standards driven
safety.
Well, they are not opposites. Standards are necessary to support
regulation intended to eliminate unsafe product from the market. Those
standards should be 'engineering and science driven', not arbitrarily
prescriptive.
--
OOO - Own Opinions Only. With best wishes. See www.jmwa.demon.co.uk
When I turn my back on the sun, it's to look for a rainbow
John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK
-
----------------------------------------------------------------
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 <emc-p...@ieee.org>
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
For help, send mail to the list administrators:
Scott Douglas <sdoug...@ieee.org>
Mike Cantwell <mcantw...@ieee.org>
For policy questions, send mail to:
Jim Bacher: <j.bac...@ieee.org>
David Heald: <dhe...@gmail.com>
