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
>
>
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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:
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unsubscribe emc-pstc
For help, send mail to the list administrators:
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For policy questions, send mail to:
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