Rich
The hazard is still there because the source thereof still exists – from a Risk Assessment perspective it is then a matter of deciding how often that hazard is likely to cause an accident Very simplistically, in the UK defence field, we generally use a 4 (Severity of perceived actual injury – the Accident) x 6 (Probability of the Accident actually occurring) matrix, per DEF STAN 00-56 and similar stds. (MIL Std 8882 is similar in concept but the terminology & matrix are different) . Therefore, with the un-encased unit there could be a high Probability of the Accident occurring, whilst with the case fitted and properly secured, that Probability is vastly reduced. Thus, from a Risk Assessment perspective, the risk of the Accident is much higher in the first scenario than in the second. However, the expertise of the relevant user also comes into the equation – so whilst Joe Public has relatively little experience to know what the risks are, the trained and experience professional repair man would know the risks and how to take relevant precautions when working on the un-cased unit. There the Risk Assessments for the two people would be significantly different. John Allen London, UK From: [email protected] [mailto:[email protected]] On Behalf Of [email protected] Sent: 02 November 2010 12:31 To: Richard Nute; [email protected] Subject: Re: [PSES] Application of the definitions of the word "hazard" Yes, the mains is a hazard. If the enclosure and insulation mitigate it adequately (I.e. tolerable risk), then no further action is necessary. ----- Reply message ----- From: "Richard Nute" <[email protected]> List-Post: [email protected] Date: Mon, Nov 1, 2010 6:59 pm Subject: [PSES] Application of the definitions of the word "hazard" To: <[email protected]> With regard to the use of the word "hazard," consider an equipment supplied from mains. We would all agree that mains is a hazardous energy source (or comprises a hazard). The equipment in question is provided with a suitable enclosure and fully complies with the applicable safety standard. We have a number of definitions for "hazard" from the various posted messages: anything potentially harmful potential for an action with adverse outcome something that can hurt you or do property damage potential source of harm Question: Does the mains within the equipment comprise a hazard? Rich - ---------------------------------------------------------------- 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 <[email protected]> All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc Graphics (in well-used formats), large files, etc. can be posted to that URL. Website: http://www.ieee-pses.org/ Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <[email protected]> Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher: <[email protected]> David Heald: <[email protected]> - ---------------------------------------------------------------- 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 <[email protected]> All emc-pstc postings are archived and searchable on the web at http://www.ieeecommunities.org/emc-pstc Graphics (in well-used formats), large files, etc. can be posted to that URL. Website: http://www.ieee-pses.org/ Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <[email protected]> Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher <[email protected]> David Heald <[email protected]> - ---------------------------------------------------------------- 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 <[email protected]> All emc-pstc postings are archived and searchable on the web at http://emc-pstc.oc.ieee.org/ Graphics (in well-used formats), large files, etc. can be posted to that URL. Website: http://www.ieee-pses.org/ Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <[email protected]> Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher <[email protected]> David Heald <[email protected]>
