Richard - I would like to know two things: - what is the preferred radius used? - what type of tape? can I assume "standard" masking tape is used? This would be good info when doing risk assessments. If you have your information source that would be great, for when I run into the "non-believers". Thx
-----Original Message----- From: [email protected] [mailto:[email protected]] Sent: Tuesday, March 21, 2000 10:27 AM To: [email protected] Subject: RE: FW: SHARP EDGES/SURFACES For those of you who perform a risk assessment on enclosures, what objective criteria do you apply to ensure that cutting hazards due to burrs and sharp edges are minimized to an acceptable level? So far I have heard of two methods: a specified minimum radius and a physical test of running tape over edges (the UL test). Richard Woods ---------- From: Dick Grobner [SMTP:[email protected]] Sent: Tuesday, March 21, 2000 10:10 AM To: '[email protected]' Cc: '[email protected]' Subject: RE: FW: SHARP EDGES/SURFACES When we perform a "risk assessment" on the design of one of our equipment enclosures, we also consider any possible hazards within the enclosure. Any harm or injury to the patient, operator or bystander (this is where I include service personnel)is not allowed, unless it can be duly justified (we strive to "design out" all potential risks). In some cases we utilize third party service personnel on a worldwide basis. I would not want any undue negative feedback related to personnel injury (or personal liability claims). Yes - I would consider internal hazards as well as external. I hope this clears things a little! -----Original Message----- From: [email protected] [mailto:[email protected]] Sent: Tuesday, March 21, 2000 8:46 AM To: Dick Grobner Subject: Re: FW: SHARP EDGES/SURFACES Dick, My question was related to SEMI standards and not IEC 601-1. Brian Harlowe gave a very good answer regarding the SEMI requirements. Now back to 950/601/1010 standards, is the requirement stricly for outer surfaces (where operator is likely to touch) or also for places such as within an enclosure where access is restricted to service personnel. I have seen many Listed/Approved units which have rough edges/surfaces which may injure a serviceman if touched (edges of PWB, card guides, heat sinks, etc.). Best Regards At 08:16 21/03/2000 -0600, you wrote: >EN 60601-1 (UL2601)section 23 states: >Surfaces, corners and edges: >Rough surfaces, sharp corners and edges which may cause injury or damage >shall be avoided or covered. >In particular, attention shall be paid to flange or frame edges and the >removal of burrs >Compliance is checked by inspection. > >I'm not familiar with ITE standards, but I would suspect that UL1950 would >address this issue also. > >In addition: a Risk Assessment / Hazard Analysis should be performed on the >design and if such hazards exist they would be identified and addressed / >eliminated. > >Hope this helps!! > > > > >-----Original Message----- >From: [email protected] [mailto:[email protected]] >Sent: Tuesday, March 21, 2000 5:29 AM >To: [email protected] >Cc: [email protected] >Subject: Re: SEMI and SHARP EDGES > > > >Hi Peter > The only reference I can find is in SEMI S8-95 the >ergonomics bit. Clause 10.1.6 states " Sharp edges or corners that >present a personnel safety hazard or potential damage to clothing or >equipment should be suitably protected or rounded" but they do not >give any dimensions. > >Mind you how do you radius the average table top/panel to 2.5ins??? > > >Brian Harlowe > > >------------------------------------------- >This message is from the IEEE EMC Society Product Safety >Technical Committee emc-pstc discussion list. > >To cancel your subscription, send mail to: > [email protected] >with the single line: > unsubscribe emc-pstc > >For help, send mail to the list administrators: > Jim Bacher: [email protected] > Michael Garretson: [email protected] > >For policy questions, send mail to: > Richard Nute: [email protected] > > Peter Merguerian Managing Director Product Testing Division I.T.L. (Product Testing) Ltd. Hacharoshet 26, POB 211 Or Yehuda 60251, Israel Tel: 972-3-5339022 Fax: 972-3-5339019 e-mail: [email protected] website: http://www.itl.co.il ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Jim Bacher: [email protected] Michael Garretson: [email protected] For policy questions, send mail to: Richard Nute: [email protected] ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Jim Bacher: [email protected] Michael Garretson: [email protected] For policy questions, send mail to: Richard Nute: [email protected] ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Jim Bacher: [email protected] Michael Garretson: [email protected] For policy questions, send mail to: Richard Nute: [email protected]
